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HTML-Sanitizer
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HTML-Sanitizer/lib/AbstractSanitizer.php

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<?php
/** @license MIT
* Copyright 2023 J. King
* See LICENSE and AUTHORS files for details */
declare(strict_types=1);
namespace MensBeam\HTML;
/** An implementation of the W3C HTML Sanitizer API.
*
* The class implements the following methods:
*
* - constructor
* - sanitize
* - sanitizeFor
* - getConfiguration
* - getDefaultConfiguration
*
* @see https://wicg.github.io/sanitizer-api/
* @see https://github.com/WICG/sanitizer-api/issues
*/
abstract class AbstractSanitizer {
/** @var int The sanitizer action to keep a node */
protected const ACTION_KEEP = 0;
/** @var int The sanitizer action to drop a node, which removes it and its children */
protected const ACTION_DROP = 1;
/** @var int The sanitizer action to block a node, which removes it while (possibly) keeping its children; this only applies to element nodes */
protected const ACTION_BLOCK = 2;
/** @var int The "unknown" kind for elements and attributes */
protected const KIND_UNKNOWN = 0;
/** @var int The "regular" kind for elements and attributes */
protected const KIND_REGULAR = 1;
/** @var string The HTML namespace */
protected const HTML_NAMESPACE = "http://www.w3.org/1999/xhtml";
/** @var string The MathML namespace */
protected const MATHML_NAMESPACE = "http://www.w3.org/1998/Math/MathML";
/** @var string The SVG namespace */
protected const SVG_NAMESPACE = "http://www.w3.org/2000/svg";
/** @var string The XLink namespace */
protected const XLINK_NAMESPACE = "http://www.w3.org/1999/xlink";
/** @var string The XML namespace */
protected const XML_NAMESPACE = "http://www.w3.org/XML/1998/namespace";
/** @var string The XMLNS namespace */
protected const XMLNS_NAMESPACE = "http://www.w3.org/2000/xmlns/";
/** @var string The null namespace; we use the empty string because it is explicitly not a valid namespace name; see https://www.w3.org/TR/REC-xml-names/#iri-use */
protected const NULL_NAMESPACE = "";
/** @var array The set of known elements, used to determine what the `allowUnknownMarkup` setting applies to */
protected const KNOWN_ELEMENTS = [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "clipPath", "defs", "desc", "discard", "ellipse", "feBlend", "feColorMatrix", "feComponentTransfer", "feComposite", "feConvolveMatrix", "feDiffuseLighting", "feDisplacementMap", "feDistantLight", "feDropShadow", "feFlood", "feFuncA", "feFuncB", "feFuncG", "feFuncR", "feGaussianBlur", "feImage", "feMerge", "feMergeNode", "feMorphology", "feOffset", "fePointLight", "feSpecularLighting", "feSpotLight", "feTile", "feTurbulence", "filter", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "mask", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"], self::HTML_NAMESPACE => ["a", "abbr", "acronym", "address", "applet", "area", "article", "aside", "audio", "b", "base", "basefont", "bdi", "bdo", "bgsound", "big", "blink", "blockquote", "body", "br", "button", "canvas", "caption", "center", "cite", "code", "col", "colgroup", "data", "datalist", "dd", "del", "details", "dfn", "dialog", "dir", "div", "dl", "dt", "em", "embed", "fieldset", "figcaption", "figure", "font", "footer", "form", "frame", "frameset", "h1", "h2", "h3", "h4", "h5", "h6", "head", "header", "hgroup", "hr", "html", "i", "iframe", "img", "input", "ins", "isindex", "kbd", "keygen", "label", "legend", "li", "link", "listing", "main", "map", "mark", "marquee", "menu", "menuitem", "meta", "meter", "multicol", "nav", "nextid", "nobr", "noembed", "noframes", "noscript", "object", "ol", "optgroup", "option", "output", "p", "param", "picture", "plaintext", "pre", "progress", "q", "rb", "rp", "rt", "rtc", "ruby", "s", "samp", "script", "search", "section", "select", "slot", "small", "source", "spacer", "span", "strike", "strong", "style", "sub", "summary", "sup", "table", "tbody", "td", "template", "textarea", "tfoot", "th", "thead", "time", "title", "tr", "track", "tt", "u", "ul", "var", "video", "wbr", "xmp"]];
/** @var array The set of known attributes, used to determine what the `allowUnknownMarkup` setting applies to */
protected const KNOWN_ATTRIBUTES = [self::NULL_NAMESPACE => ['abbr' => [self::HTML_NAMESPACE => ["td", "th"]], 'accept' => [self::HTML_NAMESPACE => ["form", "input"]], 'accept-charset' => [self::HTML_NAMESPACE => ["form"]], 'accesskey' => [self::HTML_NAMESPACE => ["*"]], 'accumulate' => [self::SVG_NAMESPACE => ["animate", "animateMotion", "animateTransform"]], 'action' => [self::HTML_NAMESPACE => ["button", "form"]], 'additive' => [self::SVG_NAMESPACE => ["animate", "animateMotion", "animateTransform"]], 'align' => [self::HTML_NAMESPACE => ["caption", "col", "div", "embed", "h1", "h2", "h3", "h4", "h5", "h6", "hr", "iframe", "img", "input", "legend", "object", "p", "table", "tbody", "td", "th", "tr"]], 'alignment-baseline' => [self::SVG_NAMESPACE => ["*"]], 'alink' => [self::HTML_NAMESPACE => ["body"]], 'allow' => [self::HTML_NAMESPACE => ["iframe"]], 'allowfullscreen' => [self::HTML_NAMESPACE => ["iframe"]], 'allowtransparency' => [self::HTML_NAMESPACE => ["iframe"]], 'alt' => [self::HTML_NAMESPACE => ["area", "img", "input"]], 'amplitude' => [self::SVG_NAMESPACE => ["feFuncA", "feFuncB", "feFuncG", "feFuncR"]], 'archive' => [self::HTML_NAMESPACE => ["object"]], 'aria-activedescendant' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-atomic' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-autocomplete' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-busy' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-checked' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-colcount' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-colindex' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-colspan' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-controls' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-current' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-describedby' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-details' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-disabled' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-dropeffect' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-errormessage' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-expanded' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-flowto' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-grabbed' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-haspopup' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-hidden' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-invalid' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-keyshortcuts' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-label' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-labelledby' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-level' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-live' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-modal' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-multiline' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-multiselectable' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-orientation' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-owns' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-placeholder' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-posinset' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-pressed' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-readonly' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-relevant' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-required' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-roledescription' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-rowcount' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-rowindex' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-rowspan' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-selected' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-setsize' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-sort' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-valuemax' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-valuemin' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-valuenow' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'aria-valuetext' => [self::HTML_NAMESPACE => ["*"], self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"]], 'as' => [self::HTML_NAMESPACE => ["link"]], 'async' => [self::HTML_NAMESPACE => ["script"]], 'attributeName' => [self::SVG_NAMESPACE => ["animate", "animateTransform", "set"]], 'autocapitalize' => [self::HTML_NAMESPACE => ["*"]], 'autocomplete' => [self::HTML_NAMESPACE => ["button", "fieldset", "form", "input", "object", "output", "select", "textarea"]], 'autofocus' => [self::HTML_NAMESPACE => ["*"]], 'autoplay' => [self::HTML_NAMESPACE => ["audio", "video"]], 'axis' => [self::HTML_NAMESPACE => ["td", "th"]], 'azimuth' => [self::SVG_NAMESPACE => ["feDistantLight"]], 'background' => [self::HTML_NAMESPACE => ["body", "table", "tbody", "td", "tfoot", "th", "thead", "tr"]], 'baseFrequency' => [self::SVG_NAMESPACE => ["feTurbulence"]], 'baseline-shift' => [self::SVG_NAMESPACE => ["*"]], 'begin' => [self::SVG_NAMESPACE => ["animate", "animateMotion", "animateTransform", "discard", "set"]], 'behavior' => [self::HTML_NAMESPACE => ["marquee"]], 'bgcolor' => [self::HTML_NAMESPACE => ["body", "table", "td", "th", "tr"]], 'bias' => [self::SVG_NAMESPACE => ["feConvolveMatrix"]], 'blocking' => [self::HTML_NAMESPACE => ["link", "script", "style"]], 'border' => [self::HTML_NAMESPACE => ["img", "input", "object", "table"]], 'bordercolor' => [self::HTML_NAMESPACE => ["table"]], 'bottommargin' => [self::HTML_NAMESPACE => ["body"]], 'by' => [self::SVG_NAMESPACE => ["animate", "animateMotion", "animateTransform"]], 'calcMode' => [self::SVG_NAMESPACE => ["animate", "animateMotion", "animateTransform"]], 'cellpadding' => [self::HTML_NAMESPACE => ["table"]], 'cellspacing' => [self::HTML_NAMESPACE => ["table"]], 'char' => [self::HTML_NAMESPACE => ["col", "tbody", "td", "th", "tr"]], 'charoff' => [self::HTML_NAMESPACE => ["col", "tbody", "td", "th", "tr"]], 'charset' => [self::HTML_NAMESPACE => ["a", "link", "meta", "script"]], 'checked' => [self::HTML_NAMESPACE => ["input"]], 'cite' => [self::HTML_NAMESPACE => ["blockquote", "del", "ins", "q"]], 'class' => [self::HTML_NAMESPACE => ["*"]], 'classid' => [self::HTML_NAMESPACE => ["object"]], 'clear' => [self::HTML_NAMESPACE => ["br"]], 'clip-path' => [self::SVG_NAMESPACE => ["*"]], 'clip-rule' => [self::SVG_NAMESPACE => ["*"]], 'clipPathUnits' => [self::SVG_NAMESPACE => ["clipPath"]], 'code' => [self::HTML_NAMESPACE => ["object"]], 'codebase' => [self::HTML_NAMESPACE => ["object"]], 'codetype' => [self::HTML_NAMESPACE => ["object"]], 'color' => [self::SVG_NAMESPACE => ["*"], self::HTML_NAMESPACE => ["hr", "link"]], 'color-interpolation' => [self::SVG_NAMESPACE => ["*"]], 'color-interpolation-filters' => [self::SVG_NAMESPACE => ["*"]], 'color-rendering' => [self::SVG_NAMESPACE => ["*"]], 'cols' => [self::HTML_NAMESPACE => ["textarea"]], 'colspan' => [self::HTML_NAMESPACE => ["td", "th"]], 'compact' => [self::HTML_NAMESPACE => ["dl", "menu", "ol", "ul"]], 'content' => [self::HTML_NAMESPACE => ["meta"]], 'contenteditable' => [self::HTML_NAMESPACE => ["*"]], 'contextmenu' => [self::HTML_NAMESPACE => ["*"]], 'controls' => [self::HTML_NAMESPACE => ["audio", "video"]], 'coords' => [self::HTML_NAMESPACE => ["a", "area"]], 'crossorigin' => [self::SVG_NAMESPACE => ["feImage", "image", "script"], self::HTML_NAMESPACE => ["audio", "img", "link", "script", "video"]], 'cursor' => [self::SVG_NAMESPACE => ["*"]], 'cx' => [self::SVG_NAMESPACE => ["circle", "ellipse", "radialGradient"]], 'cy' => [self::SVG_NAMESPACE => ["circle", "ellipse", "radialGradient"]], 'd' => [self::SVG_NAMESPACE => ["path"]], 'data' => [self::HTML_NAMESPACE => ["object"]], 'datafld' => [self::HTML_NAMESPACE => ["a", "button", "div", "fieldset", "frame", "iframe", "img", "input", "label", "legend", "marquee", "object", "select", "span", "textarea"]], 'dataformatas' => [self::HTML_NAMESPACE => ["button", "div", "input", "label", "legend", "marquee", "object", "option", "select", "span", "table"]], 'datapagesize' => [self::HTML_NAMESPACE => ["table"]], 'datasrc' => [self::HTML_NAMESPACE => ["a", "button", "div", "frame", "iframe", "img", "input", "label", "legend", "marquee", "object", "option", "select", "span", "table", "textarea"]], 'datetime' => [self::HTML_NAMESPACE => ["del", "ins", "time"]], 'declare' => [self::HTML_NAMESPACE => ["object"]], 'decoding' => [self::HTML_NAMESPACE => ["img"]], 'default' => [self::HTML_NAMESPACE => ["track"]], 'defer' => [self::HTML_NAMESPACE => ["script"]], 'diffuseConstant' => [self::SVG_NAMESPACE => ["feDiffuseLighting"]], 'dir' => [self::HTML_NAMESPACE => ["*"]], 'direction' => [self::SVG_NAMESPACE => ["*"], self::HTML_NAMESPACE => ["marquee"]], 'dirname' => [self::HTML_NAMESPACE => ["button", "fieldset", "input", "object", "output", "select", "textarea"]], 'disabled' => [self::HTML_NAMESPACE => ["button", "fieldset", "fieldset", "input", "link", "object", "optgroup", "option", "output", "select", "textarea"]], 'display' => [self::SVG_NAMESPACE => ["*"]], 'divisor' => [self::SVG_NAMESPACE => ["feConvolveMatrix"]], 'dominant-baseline' => [self::SVG_NAMESPACE => ["*"]], 'download' => [self::SVG_NAMESPACE => ["a"], self::HTML_NAMESPACE => ["a", "area"]], 'draggable' => [self::HTML_NAMESPACE => ["*"]], 'dropzone' => [self::HTML_NAMESPACE => ["*"]], 'dur' => [self::SVG_NAMESPACE => ["animate", "animateMotion", "animateTransform", "set"]], 'dx' => [self::SVG_NAMESPACE => ["feDropShadow", "feOffset", "text", "tspan"]], 'dy' => [self::SVG_NAMESPACE => ["feDropShadow", "feOffset", "text", "tspan"]], 'edgeMode' => [self::SVG_NAMESPACE => ["feGaussianBlur"]], 'elevation' => [self::SVG_NAMESPACE => ["feDistantLight"]], 'enctype' => [self::HTML_NAMESPACE => ["button", "form"]], 'end' => [self::SVG_NAMESPACE => ["animate", "animateMotion", "animateTransform", "set"]], 'enterkeyhint' => [self::HTML_NAMESPACE => ["*"]], 'event' => [self::HTML_NAMESPACE => ["script"]], 'exponent' => [self::SVG_NAMESPACE => ["feFuncA", "feFuncB", "feFuncG", "feFuncR"]], 'fetchpriority' => [self::HTML_NAMESPACE => ["img", "link", "script"]], 'fill' => [self::SVG_NAMESPACE => ["*"]], 'fill-opacity' => [self::SVG_NAMESPACE => ["*"]], 'fill-rule' => [self::SVG_NAMESPACE => ["*"]], 'filter' => [self::SVG_NAMESPACE => ["*"]], 'filterUnits' => [self::SVG_NAMESPACE => ["filter"]], 'flood-color' => [self::SVG_NAMESPACE => ["*"]], 'flood-opacity' => [self::SVG_NAMESPACE => ["*"]], 'font-family' => [self::SVG_NAMESPACE => ["*"]], 'font-size' => [self::SVG_NAMESPACE => ["*"]], 'font-size-adjust' => [self::SVG_NAMESPACE => ["*"]], 'font-stretch' => [self::SVG_NAMESPACE => ["*"]], 'font-style' => [self::SVG_NAMESPACE => ["*"]], 'font-variant' => [self::SVG_NAMESPACE => ["*"]], 'font-weight' => [self::SVG_NAMESPACE => ["*"]], 'for' => [self::HTML_NAMESPACE => ["label", "output", "script"]], 'form' => [self::HTML_NAMESPACE => ["button", "fieldset", "input", "object", "output", "select", "textarea"]], 'formaction' => [self::HTML_NAMESPACE => ["button", "form"]], 'formenctype' => [self::HTML_NAMESPACE => ["button", "form"]], 'formmethod' => [self::HTML_NAMESPACE => ["button", "form"]], 'formnovalidate' => [self::HTML_NAMESPACE => ["button", "form"]], 'formtarget' => [self::HTML_NAMESPACE => ["button", "form"]], 'fr' => [self::SVG_NAMESPACE => ["radialGradient"]], 'frame' => [self::HTML_NAMESPACE => ["table"]], 'frameborder' => [self::HTML_NAMESPACE => ["iframe"]], 'framespacing' => [self::HTML_NAMESPACE => ["iframe"]], 'from' => [self::SVG_NAMESPACE => ["animate", "animateMotion", "animateTransform"]], 'fx' => [self::SVG_NAMESPACE => ["radialGradient"]], 'fy' => [self::SVG_NAMESPACE => ["radialGradient"]], 'glyph-orientation-horizontal' => [self::SVG_NAMESPACE => ["*"]], 'glyph-orientation-vertical' => [self::SVG_NAMESPACE => ["*"]], 'gradientTransform' => [self::SVG_NAMESPACE => ["linearGradient", "radialGradient"]], 'gradientUnits' => [self::SVG_NAMESPACE => ["linearGradient", "radialGradient"]], 'headers' => [self::HTML_NAMESPACE => ["td", "th"]], 'height' => [self::SVG_NAMESPACE => ["feBlend", "feColorMatrix", "feComponentTransfer", "feComposite", "feConvolveMatrix", "feDiffuseLighting", "feDisplacementMap", "feDropShadow", "feFlood", "feGaussianBlur", "feImage", "feMerge", "feMorphology", "feOffset", "feSpecularLighting", "feTile", "feTurbulence", "filter", "foreignObject", "image", "mask", "pattern", "rect", "svg", "symbol", "use"], self::HTML_NAMESPACE => ["canvas", "embed", "iframe", "img", "object", "source", "table", "tbody", "td", "th", "tr", "video"]], 'hidden' => [self::HTML_NAMESPACE => ["*"]], 'high' => [self::HTML_NAMESPACE => ["meter"]], 'href' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "discard", "feImage", "image", "linearGradient", "mpath", "pattern", "radialGradient", "script", "set", "textPath", "use"], self::HTML_NAMESPACE => ["a", "area", "base", "link"]], 'hreflang' => [self::SVG_NAMESPACE => ["a"], self::HTML_NAMESPACE => ["a", "area", "area", "link"]], 'hspace' => [self::HTML_NAMESPACE => ["embed", "iframe", "img", "input", "object"]], 'http-equiv' => [self::HTML_NAMESPACE => ["meta"]], 'id' => [self::HTML_NAMESPACE => ["*"]], 'image-rendering' => [self::SVG_NAMESPACE => ["*"]], 'imagesizes' => [self::HTML_NAMESPACE => ["link"]], 'imagesrcset' => [self::HTML_NAMESPACE => ["link"]], 'in' => [self::SVG_NAMESPACE => ["feBlend", "feColorMatrix", "feComponentTransfer", "feComposite", "feConvolveMatrix", "feDiffuseLighting", "feDisplacementMap", "feDropShadow", "feGaussianBlur", "feMergeNode", "feMorphology", "feOffset", "feSpecularLighting", "feTile"]], 'in2' => [self::SVG_NAMESPACE => ["feBlend", "feComposite", "feDisplacementMap"]], 'inputmode' => [self::HTML_NAMESPACE => ["*"]], 'integrity' => [self::HTML_NAMESPACE => ["link", "script"]], 'intercept' => [self::SVG_NAMESPACE => ["feFuncA", "feFuncB", "feFuncG", "feFuncR"]], 'is' => [self::HTML_NAMESPACE => ["*"]], 'ismap' => [self::HTML_NAMESPACE => ["img", "input"]], 'itemid' => [self::HTML_NAMESPACE => ["*"]], 'itemprop' => [self::HTML_NAMESPACE => ["*"]], 'itemref' => [self::HTML_NAMESPACE => ["*"]], 'itemscope' => [self::HTML_NAMESPACE => ["*"]], 'itemtype' => [self::HTML_NAMESPACE => ["*"]], 'k1' => [self::SVG_NAMESPACE => ["feComposite"]], 'k2' => [self::SVG_NAMESPACE => ["feComposite"]], 'k3' => [self::SVG_NAMESPACE => ["feComposite"]], 'k4' => [self::SVG_NAMESPACE => ["feComposite"]], 'kernelMatrix' => [self::SVG_NAMESPACE => ["feConvolveMatrix", "feConvolveMatrix", "feDiffuseLighting", "feSpecularLighting"]], 'keyPoints' => [self::SVG_NAMESPACE => ["animateMotion"]], 'keySplines' => [self::SVG_NAMESPACE => ["animate", "animateMotion", "animateTransform"]], 'keyTimes' => [self::SVG_NAMESPACE => ["animate", "animateMotion", "animateTransform"]], 'kind' => [self::HTML_NAMESPACE => ["track"]], 'label' => [self::HTML_NAMESPACE => ["menu", "optgroup", "option", "track"]], 'lang' => [self::HTML_NAMESPACE => ["*"]], 'language' => [self::HTML_NAMESPACE => ["script"]], 'leftmargin' => [self::HTML_NAMESPACE => ["body"]], 'lengthAdjust' => [self::SVG_NAMESPACE => ["text", "textPath", "tspan"]], 'letter-spacing' => [self::SVG_NAMESPACE => ["*"]], 'lighting-color' => [self::SVG_NAMESPACE => ["*"]], 'limitingConeAngle' => [self::SVG_NAMESPACE => ["feSpotLight"]], 'link' => [self::HTML_NAMESPACE => ["body"]], 'list' => [self::HTML_NAMESPACE => ["input"]], 'loading' => [self::HTML_NAMESPACE => ["iframe", "img"]], 'longdesc' => [self::HTML_NAMESPACE => ["iframe", "img"]], 'loop' => [self::HTML_NAMESPACE => ["audio", "marquee", "video"]], 'low' => [self::HTML_NAMESPACE => ["meter"]], 'lowsrc' => [self::HTML_NAMESPACE => ["img"]], 'manifest' => [self::HTML_NAMESPACE => ["html"]], 'marginheight' => [self::HTML_NAMESPACE => ["body", "iframe"]], 'marginwidth' => [self::HTML_NAMESPACE => ["body", "iframe"]], 'marker-end' => [self::SVG_NAMESPACE => ["*"]], 'marker-mid' => [self::SVG_NAMESPACE => ["*"]], 'marker-start' => [self::SVG_NAMESPACE => ["*"]], 'markerHeight' => [self::SVG_NAMESPACE => ["marker"]], 'markerUnits' => [self::SVG_NAMESPACE => ["marker"]], 'markerWidth' => [self::SVG_NAMESPACE => ["marker"]], 'mask' => [self::SVG_NAMESPACE => ["*"]], 'maskContentUnits' => [self::SVG_NAMESPACE => ["mask"]], 'maskUnits' => [self::SVG_NAMESPACE => ["mask"]], 'max' => [self::SVG_NAMESPACE => ["animate", "animateMotion", "animateTransform", "set"], self::HTML_NAMESPACE => ["input", "meter", "progress"]], 'maxlength' => [self::HTML_NAMESPACE => ["input", "textarea"]], 'media' => [self::SVG_NAMESPACE => ["style"], self::HTML_NAMESPACE => ["link", "meta", "source", "style"]], 'method' => [self::SVG_NAMESPACE => ["textPath"], self::HTML_NAMESPACE => ["button", "form"]], 'methods' => [self::HTML_NAMESPACE => ["a", "link"]], 'min' => [self::SVG_NAMESPACE => ["animate", "animateMotion", "animateTransform", "set"], self::HTML_NAMESPACE => ["input", "meter"]], 'minlength' => [self::HTML_NAMESPACE => ["input", "textarea"]], 'mode' => [self::SVG_NAMESPACE => ["feBlend"]], 'multiple' => [self::HTML_NAMESPACE => ["input", "select"]], 'muted' => [self::HTML_NAMESPACE => ["audio", "video"]], 'name' => [self::HTML_NAMESPACE => ["a", "button", "embed", "fieldset", "form", "iframe", "img", "input", "map", "meta", "object", "option", "output", "select", "slot", "textarea"]], 'nohref' => [self::HTML_NAMESPACE => ["area"]], 'nomodule' => [self::HTML_NAMESPACE => ["script"]], 'nonce' => [self::HTML_NAMESPACE => ["*"]], 'noshade' => [self::HTML_NAMESPACE => ["hr"]], 'novalidate' => [self::HTML_NAMESPACE => ["button", "form"]], 'nowrap' => [self::HTML_NAMESPACE => ["td", "th"]], 'numOctaves' => [self::SVG_NAMESPACE => ["feTurbulence"]], 'offset' => [self::SVG_NAMESPACE => ["feFuncA", "feFuncB", "feFuncG", "feFuncR", "stop"]], 'onabort' => [self::SVG_NAMESPACE => ["svg"]], 'onafterprint' => [self::SVG_NAMESPACE => ["*"]], 'onbeforeprint' => [self::SVG_NAMESPACE => ["*"]], 'onbegin' => [self::SVG_NAMESPACE => ["animate", "animateMotion", "animateTransform", "set"]], 'oncancel' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'oncanplay' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'oncanplaythrough' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'onchange' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'onclick' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'onclose' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'oncopy' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'oncuechange' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'oncut' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", 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"symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'ondragend' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'ondragenter' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'ondragexit' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'ondragleave' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'ondragover' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'ondragstart' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'ondrop' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'ondurationchange' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'onemptied' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'onend' => [self::SVG_NAMESPACE => ["animate", "animateMotion", "animateTransform", "set"]], 'onended' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'onerror' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'onfocus' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'onfocusin' => [self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "defs", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video"]], 'onfocusout' => [self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "defs", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video"]], 'onhashchange' => [self::SVG_NAMESPACE => ["*"]], 'oninput' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'oninvalid' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'onkeydown' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'onkeypress' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'onkeyup' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'onload' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'onloadeddata' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'onloadedmetadata' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'onloadstart' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'onmessage' => [self::SVG_NAMESPACE => ["*"]], 'onmousedown' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'onmouseenter' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'onmouseleave' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'onmousemove' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'onmouseout' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'onmouseover' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'onmouseup' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'onmousewheel' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'onoffline' => [self::SVG_NAMESPACE => ["*"]], 'ononline' => [self::SVG_NAMESPACE => ["*"]], 'onpagehide' => [self::SVG_NAMESPACE => ["*"]], 'onpageshow' => [self::SVG_NAMESPACE => ["*"]], 'onpaste' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'onpause' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'onplay' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'onplaying' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'onpopstate' => [self::SVG_NAMESPACE => ["*"]], 'onprogress' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'onratechange' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'onrepeat' => [self::SVG_NAMESPACE => ["animate", "animateMotion", "animateTransform", "set"]], 'onreset' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'onresize' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'onscroll' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'onseeked' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'onseeking' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'onselect' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'onshow' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"], self::HTML_NAMESPACE => ["*"]], 'onstalled' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'onstorage' => [self::SVG_NAMESPACE => ["*"]], 'onsubmit' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'onsuspend' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'ontimeupdate' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'ontoggle' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'onunload' => [self::SVG_NAMESPACE => ["*"]], 'onvolumechange' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'onwaiting' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "defs", "desc", "ellipse", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'opacity' => [self::SVG_NAMESPACE => ["*"]], 'open' => [self::HTML_NAMESPACE => ["details", "dialog"]], 'operator' => [self::SVG_NAMESPACE => ["feComposite", "feMorphology"]], 'optimum' => [self::HTML_NAMESPACE => ["meter"]], 'order' => [self::SVG_NAMESPACE => ["feConvolveMatrix"]], 'orient' => [self::SVG_NAMESPACE => ["marker"]], 'origin' => [self::SVG_NAMESPACE => ["animateMotion"]], 'overflow' => [self::SVG_NAMESPACE => ["*"]], 'paint-order' => [self::SVG_NAMESPACE => ["*"]], 'path' => [self::SVG_NAMESPACE => ["animateMotion", "textPath"]], 'pathLength' => [self::SVG_NAMESPACE => ["circle", "ellipse", "line", "path", "polygon", "polyline", "rect"]], 'pattern' => [self::HTML_NAMESPACE => ["input"]], 'patternContentUnits' => [self::SVG_NAMESPACE => ["pattern"]], 'patternTransform' => [self::SVG_NAMESPACE => ["pattern"]], 'patternUnits' => [self::SVG_NAMESPACE => ["pattern"]], 'ping' => [self::SVG_NAMESPACE => ["a"], self::HTML_NAMESPACE => ["a", "area"]], 'placeholder' => [self::HTML_NAMESPACE => ["input", "textarea"]], 'playbackorder' => [self::SVG_NAMESPACE => ["svg"]], 'playsinline' => [self::HTML_NAMESPACE => ["video"]], 'pointer-events' => [self::SVG_NAMESPACE => ["*"]], 'points' => [self::SVG_NAMESPACE => ["polygon", "polyline"]], 'pointsAtX' => [self::SVG_NAMESPACE => ["feSpotLight"]], 'pointsAtY' => [self::SVG_NAMESPACE => ["feSpotLight"]], 'pointsAtZ' => [self::SVG_NAMESPACE => ["feSpotLight"]], 'popover' => [self::HTML_NAMESPACE => ["*"]], 'popovertarget' => [self::HTML_NAMESPACE => ["*"]], 'popovertargetaction' => [self::HTML_NAMESPACE => ["*"]], 'poster' => [self::HTML_NAMESPACE => ["video"]], 'preload' => [self::HTML_NAMESPACE => ["audio", "video"]], 'preserveAlpha' => [self::SVG_NAMESPACE => ["feConvolveMatrix"]], 'preserveAspectRatio' => [self::SVG_NAMESPACE => ["canvas", "feImage", "image", "marker", "pattern", "svg", "symbol", "view"]], 'primitiveUnits' => [self::SVG_NAMESPACE => ["filter"]], 'profile' => [self::HTML_NAMESPACE => ["head"]], 'r' => [self::SVG_NAMESPACE => ["circle", "radialGradient"]], 'radius' => [self::SVG_NAMESPACE => ["feMorphology"]], 'readonly' => [self::HTML_NAMESPACE => ["form-associated custom elements", "input", "textarea"]], 'refX' => [self::SVG_NAMESPACE => ["marker", "symbol"]], 'refY' => [self::SVG_NAMESPACE => ["marker", "symbol"]], 'referrerpolicy' => [self::SVG_NAMESPACE => ["a"], self::HTML_NAMESPACE => ["a", "area", "iframe", "img", "link", "script"]], 'rel' => [self::SVG_NAMESPACE => ["a"], self::HTML_NAMESPACE => ["a", "area", "form", "link"]], 'repeatCount' => [self::SVG_NAMESPACE => ["animate", "animateMotion", "animateTransform", "set"]], 'repeatDur' => [self::SVG_NAMESPACE => ["animate", "animateMotion", "animateTransform", "set"]], 'required' => [self::HTML_NAMESPACE => ["input", "select", "textarea"]], 'requiredExtensions' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "clipPath", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "mask", "path", "polygon", "polyline", "rect", "set", "svg", "switch", "text", "textPath", "tspan", "unknown", "use", "video"]], 'restart' => [self::SVG_NAMESPACE => ["animate", "animateMotion", "animateTransform", "set"]], 'result' => [self::SVG_NAMESPACE => ["feBlend", "feColorMatrix", "feComponentTransfer", "feComposite", "feConvolveMatrix", "feDiffuseLighting", "feDisplacementMap", "feDropShadow", "feFlood", "feGaussianBlur", "feImage", "feMerge", "feMorphology", "feOffset", "feSpecularLighting", "feTile", "feTurbulence"]], 'rev' => [self::HTML_NAMESPACE => ["a", "link"]], 'reversed' => [self::HTML_NAMESPACE => ["ol"]], 'rightmargin' => [self::HTML_NAMESPACE => ["body"]], 'role' => [self::SVG_NAMESPACE => ["a", "audio", "canvas", "circle", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "path", "polygon", "polyline", "rect", "svg", "switch", "symbol", "text", "textPath", "tspan", "unknown", "use", "video", "view"], self::HTML_NAMESPACE => ["*"]], 'rotate' => [self::SVG_NAMESPACE => ["animateMotion", "text", "tspan"]], 'rows' => [self::HTML_NAMESPACE => ["textarea"]], 'rowspan' => [self::HTML_NAMESPACE => ["td", "th"]], 'rules' => [self::HTML_NAMESPACE => ["table"]], 'rx' => [self::SVG_NAMESPACE => ["ellipse", "rect"]], 'ry' => [self::SVG_NAMESPACE => ["ellipse", "rect"]], 'sandbox' => [self::HTML_NAMESPACE => ["iframe"]], 'scale' => [self::SVG_NAMESPACE => ["feDisplacementMap"]], 'scheme' => [self::HTML_NAMESPACE => ["meta"]], 'scope' => [self::HTML_NAMESPACE => ["td", "th"]], 'scrolling' => [self::HTML_NAMESPACE => ["iframe"]], 'seed' => [self::SVG_NAMESPACE => ["feTurbulence"]], 'selected' => [self::HTML_NAMESPACE => ["option"]], 'shape' => [self::HTML_NAMESPACE => ["a", "area"]], 'shape-rendering' => [self::SVG_NAMESPACE => ["*"]], 'side' => [self::SVG_NAMESPACE => ["textPath"]], 'size' => [self::HTML_NAMESPACE => ["hr", "input", "select"]], 'sizes' => [self::HTML_NAMESPACE => ["img", "link", "source"]], 'slope' => [self::SVG_NAMESPACE => ["feFuncA", "feFuncB", "feFuncG", "feFuncR"]], 'slot' => [self::HTML_NAMESPACE => ["*"]], 'spacing' => [self::SVG_NAMESPACE => ["textPath"]], 'span' => [self::HTML_NAMESPACE => ["col", "colgroup"]], 'specularConstant' => [self::SVG_NAMESPACE => ["feSpecularLighting"]], 'specularExponent' => [self::SVG_NAMESPACE => ["feSpecularLighting", "feSpotLight"]], 'spellcheck' => [self::HTML_NAMESPACE => ["*"]], 'spreadMethod' => [self::SVG_NAMESPACE => ["linearGradient", "radialGradient"]], 'src' => [self::HTML_NAMESPACE => ["audio", "embed", "iframe", "img", "input", "script", "source", "track", "video"]], 'srcdoc' => [self::HTML_NAMESPACE => ["iframe"]], 'srclang' => [self::HTML_NAMESPACE => ["track"]], 'srcset' => [self::HTML_NAMESPACE => ["img", "source"]], 'standby' => [self::HTML_NAMESPACE => ["object"]], 'start' => [self::HTML_NAMESPACE => ["ol"]], 'startOffset' => [self::SVG_NAMESPACE => ["textPath"]], 'stdDeviation' => [self::SVG_NAMESPACE => ["feDropShadow", "feGaussianBlur"]], 'step' => [self::HTML_NAMESPACE => ["input"]], 'stitchTiles' => [self::SVG_NAMESPACE => ["feTurbulence"]], 'stop-color' => [self::SVG_NAMESPACE => ["*"]], 'stop-opacity' => [self::SVG_NAMESPACE => ["*"]], 'stroke' => [self::SVG_NAMESPACE => ["*"]], 'stroke-dasharray' => [self::SVG_NAMESPACE => ["*"]], 'stroke-dashoffset' => [self::SVG_NAMESPACE => ["*"]], 'stroke-linecap' => [self::SVG_NAMESPACE => ["*"]], 'stroke-linejoin' => [self::SVG_NAMESPACE => ["*"]], 'stroke-miterlimit' => [self::SVG_NAMESPACE => ["*"]], 'stroke-opacity' => [self::SVG_NAMESPACE => ["*"]], 'stroke-width' => [self::SVG_NAMESPACE => ["*"]], 'style' => [self::HTML_NAMESPACE => ["*"]], 'summary' => [self::HTML_NAMESPACE => ["table"]], 'surfaceScale' => [self::SVG_NAMESPACE => ["feDiffuseLighting", "feSpecularLighting"]], 'systemLanguage' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "clipPath", "discard", "ellipse", "foreignObject", "g", "iframe", "image", "line", "mask", "path", "polygon", "polyline", "rect", "set", "svg", "switch", "text", "textPath", "tspan", "unknown", "use", "video"]], 'tabindex' => [self::HTML_NAMESPACE => ["*"]], 'tableValues' => [self::SVG_NAMESPACE => ["feFuncA", "feFuncB", "feFuncG", "feFuncR"]], 'target' => [self::SVG_NAMESPACE => ["a"], self::HTML_NAMESPACE => ["a", "area", "base", "button", "form", "link"]], 'targetX' => [self::SVG_NAMESPACE => ["feConvolveMatrix"]], 'targetY' => [self::SVG_NAMESPACE => ["feConvolveMatrix"]], 'text' => [self::HTML_NAMESPACE => ["body"]], 'text-anchor' => [self::SVG_NAMESPACE => ["*"]], 'text-decoration' => [self::SVG_NAMESPACE => ["*"]], 'text-overflow' => [self::SVG_NAMESPACE => ["*"]], 'text-rendering' => [self::SVG_NAMESPACE => ["*"]], 'textLength' => [self::SVG_NAMESPACE => ["text", "textPath", "tspan"]], 'timelinebegin' => [self::SVG_NAMESPACE => ["svg"]], 'title' => [self::HTML_NAMESPACE => ["*"]], 'to' => [self::SVG_NAMESPACE => ["animate", "animateMotion", "animateTransform", "set"]], 'topmargin' => [self::HTML_NAMESPACE => ["body"]], 'transform' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "clipPath", "defs", "desc", "discard", "ellipse", "feBlend", "feColorMatrix", "feComponentTransfer", "feComposite", "feConvolveMatrix", "feDiffuseLighting", "feDisplacementMap", "feDistantLight", "feDropShadow", "feFlood", "feFuncA", "feFuncB", "feFuncG", "feFuncR", "feGaussianBlur", "feImage", "feMerge", "feMergeNode", "feMorphology", "feOffset", "fePointLight", "feSpecularLighting", "feSpotLight", "feTile", "feTurbulence", "filter", "foreignObject", "g", "iframe", "image", "line", "marker", "mask", "metadata", "mpath", "path", "polygon", "polyline", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]], 'translate' => [self::HTML_NAMESPACE => ["*"]], 'truespeed' => [self::HTML_NAMESPACE => ["marquee"]], 'type' => [self::SVG_NAMESPACE => ["a", "animateTransform", "feColorMatrix", "feFuncA", "feFuncB", "feFuncG", "feFuncR", "feTurbulence", "script", "style"], self::HTML_NAMESPACE => ["a", "area", "area", "button", "embed", "input", "li", "link", "menu", "object", "ol", "script", "source", "style", "ul"]], 'typemustmatch' => [self::HTML_NAMESPACE => ["object"]], 'unicode-bidi' => [self::SVG_NAMESPACE => ["*"]], 'urn' => [self::HTML_NAMESPACE => ["a", "link"]], 'usemap' => [self::HTML_NAMESPACE => ["img", "input", "object"]], 'valign' => [self::HTML_NAMESPACE => ["col", "tbody", "td", "th", "tr"]], 'value' => [self::HTML_NAMESPACE => ["button", "data", "input", "li", "meter", "option", "progress"]], 'values' => [self::SVG_NAMESPACE => ["animate", "animateMotion", "animateTransform", "feColorMatrix"]], 'vector-effect' => [self::SVG_NAMESPACE => ["*"]], 'version' => [self::HTML_NAMESPACE => ["html"]], 'viewBox' => [self::SVG_NAMESPACE => ["marker", "pattern", "svg", "symbol", "view"]], 'visibility' => [self::SVG_NAMESPACE => ["*"]], 'vlink' => [self::HTML_NAMESPACE => ["body"]], 'vspace' => [self::HTML_NAMESPACE => ["embed", "iframe", "img", "input", "object"]], 'white-space' => [self::SVG_NAMESPACE => ["*"]], 'width' => [self::SVG_NAMESPACE => ["feBlend", "feColorMatrix", "feComponentTransfer", "feComposite", "feConvolveMatrix", "feDiffuseLighting", "feDisplacementMap", "feDropShadow", "feFlood", "feGaussianBlur", "feImage", "feMerge", "feMorphology", "feOffset", "feSpecularLighting", "feTile", "feTurbulence", "filter", "foreignObject", "image", "mask", "pattern", "rect", "svg", "symbol", "use"], self::HTML_NAMESPACE => ["canvas", "col", "embed", "hr", "iframe", "img", "object", "pre", "source", "table", "td", "th", "video"]], 'word-spacing' => [self::SVG_NAMESPACE => ["*"]], 'wrap' => [self::HTML_NAMESPACE => ["textarea"]], 'writing-mode' => [self::SVG_NAMESPACE => ["*"]], 'x' => [self::SVG_NAMESPACE => ["feBlend", "feColorMatrix", "feComponentTransfer", "feComposite", "feConvolveMatrix", "feDiffuseLighting", "feDisplacementMap", "feDropShadow", "feFlood", "feGaussianBlur", "feImage", "feMerge", "feMorphology", "feOffset", "fePointLight", "feSpecularLighting", "feSpotLight", "feTile", "feTurbulence", "filter", "foreignObject", "image", "mask", "pattern", "rect", "svg", "symbol", "text", "tspan", "use"]], 'x1' => [self::SVG_NAMESPACE => ["line", "linearGradient"]], 'x2' => [self::SVG_NAMESPACE => ["line", "linearGradient"]], 'xChannelSelector' => [self::SVG_NAMESPACE => ["feDisplacementMap"]], 'y' => [self::SVG_NAMESPACE => ["feBlend", "feColorMatrix", "feComponentTransfer", "feComposite", "feConvolveMatrix", "feDiffuseLighting", "feDisplacementMap", "feDropShadow", "feFlood", "feGaussianBlur", "feImage", "feMerge", "feMorphology", "feOffset", "fePointLight", "feSpecularLighting", "feSpotLight", "feTile", "feTurbulence", "filter", "foreignObject", "image", "mask", "pattern", "rect", "svg", "symbol", "text", "tspan", "use"]], 'y1' => [self::SVG_NAMESPACE => ["line", "linearGradient"]], 'y2' => [self::SVG_NAMESPACE => ["line", "linearGradient"]], 'yChannelSelector' => [self::SVG_NAMESPACE => ["feDisplacementMap"]], 'z' => [self::SVG_NAMESPACE => ["fePointLight", "feSpotLight"]], 'zoomAndPan' => [self::SVG_NAMESPACE => ["svg", "view"]]], self::XLINK_NAMESPACE => ['href' => [self::SVG_NAMESPACE => ["a", "image", "linearGradient", "pattern", "radialGradient", "script", "textPath", "use", "feImage"]], 'title' => [self::SVG_NAMESPACE => ["a", "image", "linearGradient", "pattern", "radialGradient", "script", "textPath", "use"]]], self::XML_NAMESPACE => ['space' => [self::SVG_NAMESPACE => ["a", "animate", "animateMotion", "animateTransform", "audio", "canvas", "circle", "clipPath", "defs", "desc", "discard", "ellipse", "feBlend", "feColorMatrix", "feComponentTransfer", "feComposite", "feConvolveMatrix", "feDiffuseLighting", "feDisplacementMap", "feDistantLight", "feDropShadow", "feFlood", "feFuncA", "feFuncB", "feFuncG", "feFuncR", "feGaussianBlur", "feImage", "feMerge", "feMergeNode", "feMorphology", "feOffset", "fePointLight", "feSpecularLighting", "feSpotLight", "feTile", "feTurbulence", "filter", "foreignObject", "g", "iframe", "image", "line", "linearGradient", "marker", "mask", "metadata", "mpath", "path", "pattern", "polygon", "polyline", "radialGradient", "rect", "script", "set", "stop", "style", "svg", "switch", "symbol", "text", "textPath", "title", "tspan", "unknown", "use", "video", "view"]]]];
/** @var array The baseline list of allowed attributes */
protected const BASELINE_ATTR = [
self::HTML_NAMESPACE => [
'abbr' => true,
'accept' => true,
'accept-charset' => true,
'accesskey' => true,
'action' => true,
'align' => true,
'alink' => true,
'allow' => true,
'allowfullscreen' => true,
'allowpaymentrequest' => true,
'alt' => true,
'anchor' => true,
'archive' => true,
'as' => true,
'async' => true,
'autocapitalize' => true,
'autocomplete' => true,
'autocorrect' => true,
'autofocus' => true,
'autopictureinpicture' => true,
'autoplay' => true,
'axis' => true,
'background' => true,
'behavior' => true,
'bgcolor' => true,
'border' => true,
'bordercolor' => true,
'capture' => true,
'cellpadding' => true,
'cellspacing' => true,
'challenge' => true,
'char' => true,
'charoff' => true,
'charset' => true,
'checked' => true,
'cite' => true,
'class' => true,
'classid' => true,
'clear' => true,
'code' => true,
'codebase' => true,
'codetype' => true,
'color' => true,
'cols' => true,
'colspan' => true,
'compact' => true,
'content' => true,
'contenteditable' => true,
'controls' => true,
'controlslist' => true,
'conversiondestination' => true,
'coords' => true,
'crossorigin' => true,
'csp' => true,
'data' => true,
'datetime' => true,
'declare' => true,
'decoding' => true,
'default' => true,
'defer' => true,
'dir' => true,
'direction' => true,
'dirname' => true,
'disabled' => true,
'disablepictureinpicture' => true,
'disableremoteplayback' => true,
'disallowdocumentaccess' => true,
'download' => true,
'draggable' => true,
'elementtiming' => true,
'enctype' => true,
'end' => true,
'enterkeyhint' => true,
'event' => true,
'exportparts' => true,
'face' => true,
'for' => true,
'form' => true,
'formaction' => true,
'formenctype' => true,
'formmethod' => true,
'formnovalidate' => true,
'formtarget' => true,
'frame' => true,
'frameborder' => true,
'headers' => true,
'height' => true,
'hidden' => true,
'high' => true,
'href' => true,
'hreflang' => true,
'hreftranslate' => true,
'hspace' => true,
'http-equiv' => true,
'id' => true,
'imagesizes' => true,
'imagesrcset' => true,
'importance' => true,
'impressiondata' => true,
'impressionexpiry' => true,
'incremental' => true,
'inert' => true,
'inputmode' => true,
'integrity' => true,
'invisible' => true,
'is' => true,
'ismap' => true,
'keytype' => true,
'kind' => true,
'label' => true,
'lang' => true,
'language' => true,
'latencyhint' => true,
'leftmargin' => true,
'link' => true,
'list' => true,
'loading' => true,
'longdesc' => true,
'loop' => true,
'low' => true,
'lowsrc' => true,
'manifest' => true,
'marginheight' => true,
'marginwidth' => true,
'max' => true,
'maxlength' => true,
'mayscript' => true,
'media' => true,
'method' => true,
'min' => true,
'minlength' => true,
'multiple' => true,
'muted' => true,
'name' => true,
'nohref' => true,
'nomodule' => true,
'nonce' => true,
'noresize' => true,
'noshade' => true,
'novalidate' => true,
'nowrap' => true,
'object' => true,
'open' => true,
'optimum' => true,
'part' => true,
'pattern' => true,
'ping' => true,
'placeholder' => true,
'playsinline' => true,
'policy' => true,
'poster' => true,
'preload' => true,
'pseudo' => true,
'readonly' => true,
'referrerpolicy' => true,
'rel' => true,
'reportingorigin' => true,
'required' => true,
'resources' => true,
'rev' => true,
'reversed' => true,
'role' => true,
'rows' => true,
'rowspan' => true,
'rules' => true,
'sandbox' => true,
'scheme' => true,
'scope' => true,
'scopes' => true,
'scrollamount' => true,
'scrolldelay' => true,
'scrolling' => true,
'select' => true,
'selected' => true,
'shadowroot' => true,
'shadowrootdelegatesfocus' => true,
'shape' => true,
'size' => true,
'sizes' => true,
'slot' => true,
'span' => true,
'spellcheck' => true,
'src' => true,
'srcdoc' => true,
'srclang' => true,
'srcset' => true,
'standby' => true,
'start' => true,
'step' => true,
'style' => true,
'summary' => true,
'tabindex' => true,
'target' => true,
'text' => true,
'title' => true,
'topmargin' => true,
'translate' => true,
'truespeed' => true,
'trusttoken' => true,
'type' => true,
'usemap' => true,
'valign' => true,
'value' => true,
'valuetype' => true,
'version' => true,
'virtualkeyboardpolicy' => true,
'vlink' => true,
'vspace' => true,
'webkitdirectory' => true,
'width' => true,
'wrap' => true,
],
];
/** @var array The default configuration structure */
protected const DEFAULT_CONF = [
'allowElements' => [
self::HTML_NAMESPACE => [
'a' => true,
'abbr' => true,
'acronym' => true,
'address' => true,
'area' => true,
'article' => true,
'aside' => true,
'audio' => true,
'b' => true,
'bdi' => true,
'bdo' => true,
'bgsound' => true,
'big' => true,
'blockquote' => true,
'body' => true,
'br' => true,
'button' => true,
'canvas' => true,
'caption' => true,
'center' => true,
'cite' => true,
'code' => true,
'col' => true,
'colgroup' => true,
'datalist' => true,
'dd' => true,
'del' => true,
'details' => true,
'dfn' => true,
'dialog' => true,
'dir' => true,
'div' => true,
'dl' => true,
'dt' => true,
'em' => true,
'fieldset' => true,
'figcaption' => true,
'figure' => true,
'font' => true,
'footer' => true,
'form' => true,
'h1' => true,
'h2' => true,
'h3' => true,
'h4' => true,
'h5' => true,
'h6' => true,
'head' => true,
'header' => true,
'hgroup' => true,
'hr' => true,
'html' => true,
'i' => true,
'img' => true,
'input' => true,
'ins' => true,
'kbd' => true,
'keygen' => true,
'label' => true,
'layer' => true,
'legend' => true,
'li' => true,
'link' => true,
'listing' => true,
'main' => true,
'map' => true,
'mark' => true,
'marquee' => true,
'menu' => true,
'meta' => true,
'meter' => true,
'nav' => true,
'nobr' => true,
'ol' => true,
'optgroup' => true,
'option' => true,
'output' => true,
'p' => true,
'picture' => true,
'popup' => true,
'pre' => true,
'progress' => true,
'q' => true,
'rb' => true,
'rp' => true,
'rt' => true,
'rtc' => true,
'ruby' => true,
's' => true,
'samp' => true,
'search' => true,
'section' => true,
'select' => true,
'selectmenu' => true,
'small' => true,
'source' => true,
'span' => true,
'strike' => true,
'strong' => true,
'style' => true,
'sub' => true,
'summary' => true,
'sup' => true,
'table' => true,
'tbody' => true,
'td' => true,
'tfoot' => true,
'th' => true,
'thead' => true,
'time' => true,
'tr' => true,
'track' => true,
'tt' => true,
'u' => true,
'ul' => true,
'var' => true,
'video' => true,
'wbr' => true,
]
],
'allowAttributes' => [
self::NULL_NAMESPACE => [
'abbr' => "*",
'accept' => "*",
'accept-charset' => "*",
'accesskey' => "*",
'action' => "*",
'align' => "*",
'alink' => "*",
'allow' => "*",
'allowfullscreen' => "*",
'alt' => "*",
'anchor' => "*",
'archive' => "*",
'as' => "*",
'async' => "*",
'autocapitalize' => "*",
'autocomplete' => "*",
'autocorrect' => "*",
'autofocus' => "*",
'autopictureinpicture' => "*",
'autoplay' => "*",
'axis' => "*",
'background' => "*",
'behavior' => "*",
'bgcolor' => "*",
'border' => "*",
'bordercolor' => "*",
'capture' => "*",
'cellpadding' => "*",
'cellspacing' => "*",
'challenge' => "*",
'char' => "*",
'charoff' => "*",
'charset' => "*",
'checked' => "*",
'cite' => "*",
'class' => "*",
'classid' => "*",
'clear' => "*",
'code' => "*",
'codebase' => "*",
'codetype' => "*",
'color' => "*",
'cols' => "*",
'colspan' => "*",
'compact' => "*",
'content' => "*",
'contenteditable' => "*",
'controls' => "*",
'controlslist' => "*",
'conversiondestination' => "*",
'coords' => "*",
'crossorigin' => "*",
'csp' => "*",
'data' => "*",
'datetime' => "*",
'declare' => "*",
'decoding' => "*",
'default' => "*",
'defer' => "*",
'dir' => "*",
'direction' => "*",
'dirname' => "*",
'disabled' => "*",
'disablepictureinpicture' => "*",
'disableremoteplayback' => "*",
'disallowdocumentaccess' => "*",
'download' => "*",
'draggable' => "*",
'elementtiming' => "*",
'enctype' => "*",
'end' => "*",
'enterkeyhint' => "*",
'event' => "*",
'exportparts' => "*",
'face' => "*",
'for' => "*",
'form' => "*",
'formaction' => "*",
'formenctype' => "*",
'formmethod' => "*",
'formnovalidate' => "*",
'formtarget' => "*",
'frame' => "*",
'frameborder' => "*",
'headers' => "*",
'height' => "*",
'hidden' => "*",
'high' => "*",
'href' => "*",
'hreflang' => "*",
'hreftranslate' => "*",
'hspace' => "*",
'http-equiv' => "*",
'id' => "*",
'imagesizes' => "*",
'imagesrcset' => "*",
'importance' => "*",
'impressiondata' => "*",
'impressionexpiry' => "*",
'incremental' => "*",
'inert' => "*",
'inputmode' => "*",
'integrity' => "*",
'invisible' => "*",
'is' => "*",
'ismap' => "*",
'keytype' => "*",
'kind' => "*",
'label' => "*",
'lang' => "*",
'language' => "*",
'latencyhint' => "*",
'leftmargin' => "*",
'link' => "*",
'list' => "*",
'loading' => "*",
'longdesc' => "*",
'loop' => "*",
'low' => "*",
'lowsrc' => "*",
'manifest' => "*",
'marginheight' => "*",
'marginwidth' => "*",
'max' => "*",
'maxlength' => "*",
'mayscript' => "*",
'media' => "*",
'method' => "*",
'min' => "*",
'minlength' => "*",
'multiple' => "*",
'muted' => "*",
'name' => "*",
'nohref' => "*",
'nomodule' => "*",
'nonce' => "*",
'noresize' => "*",
'noshade' => "*",
'novalidate' => "*",
'nowrap' => "*",
'object' => "*",
'open' => "*",
'optimum' => "*",
'part' => "*",
'pattern' => "*",
'ping' => "*",
'placeholder' => "*",
'playsinline' => "*",
'policy' => "*",
'poster' => "*",
'preload' => "*",
'pseudo' => "*",
'readonly' => "*",
'referrerpolicy' => "*",
'rel' => "*",
'reportingorigin' => "*",
'required' => "*",
'resources' => "*",
'rev' => "*",
'reversed' => "*",
'role' => "*",
'rows' => "*",
'rowspan' => "*",
'rules' => "*",
'sandbox' => "*",
'scheme' => "*",
'scope' => "*",
'scopes' => "*",
'scrollamount' => "*",
'scrolldelay' => "*",
'scrolling' => "*",
'select' => "*",
'selected' => "*",
'shadowroot' => "*",
'shadowrootdelegatesfocus' => "*",
'shape' => "*",
'size' => "*",
'sizes' => "*",
'slot' => "*",
'span' => "*",
'spellcheck' => "*",
'src' => "*",
'srcdoc' => "*",
'srclang' => "*",
'srcset' => "*",
'standby' => "*",
'start' => "*",
'step' => "*",
'style' => "*",
'summary' => "*",
'tabindex' => "*",
'target' => "*",
'text' => "*",
'title' => "*",
'topmargin' => "*",
'translate' => "*",
'truespeed' => "*",
'trusttoken' => "*",
'type' => "*",
'usemap' => "*",
'valign' => "*",
'value' => "*",
'valuetype' => "*",
'version' => "*",
'virtualkeyboardpolicy' => "*",
'vlink' => "*",
'vspace' => "*",
'webkitdirectory' => "*",
'width' => "*",
'wrap' => "*",
],
],
'allowCustomElements' => false,
'allowUnknownMarkup' => false,
'allowComments' => false,
'allowProcessingInstructions' => false,
'nullNamespaceAsHtml' => true,
];
/** @var array The parsed configuration, as used for processing */
protected $config;
/** Initializes a sanitizer with the provided configuration, or the default configuration if no configuration is provided
*
* The configuration array may contain any of the following keys:
*
* - `allowElements`: an indexed array of elements to retain in the tree. Elements not in this list will be treated as if they were included in the `blockElements` list
* - `blockElements`: an indexed array of elements to remove from the tree while retaining their children
* - `dropElements`: an indexed array of elements to remove from the tree along with their children
* - `allowAttributes`: an indexed array of attributes to allow on certain elements. Attributes not in this list will be dropped
* - `dropAttributes`: an indexed array of attributes to remove from certain elements
* - `allowCustomElements`: Whether to allow custom elements, false by default. For the purposes of this implementation these are HTML elements with names containing dashed. If true, elements are still subject to the allow, block, and drop lists
* - `allowUnknownMarkup`: Whether to allow non-standard elements which are not custom elements, false by default. If true, elements are still subject to the allow, block, and drop lists
* - `allowComments`: Whether to retain comments, false by default
* - `allowProcessingInstructions`: Whether to retain processing instructions, false by default. Processing instructions do not normally appear in HTML documents. This option is an extension to the specification
* - `nullNamespaceAsHtml`: Whether to interpret elements from the tree in the null namespace as being in the HTML namespace, true by default. Per standard behaviour HTML elements have a namespace URI, but not all PHP-based parsers do this. This may be set to false when sanitizing XML documents. This option is an extension to the specification
*
* The entries in element lists may be strings, in which case these are interpreted as local names in the HTML namespace, or an array with the following keys:
*
* - `name`: The localName of the element
* - `namespace`: The namespaceURI of the element, a string or null. If omitted the HTML namespace is assumed
*
* The entries in attribute lists are arrays with the following keys
*
* - `name`: The localName of the attribute
* - `namespace`: The namespaceURI of the attribute. If omitted the null namespace is assumed
* - `elements`: An indexed array of elements on which to allow the attribute, in the same format as other element lists. The string `"*"` may be supplied instead of an array to mean all elements
*
* @param array $config A configuration to use instead of the default one
*/
public function __construct(array $config = null) {
if ($config === null) {
// use the default configuration if none is specified
$this->config = self::DEFAULT_CONF;
} else {
// otherwise validate the configuration; the specification provides
// no clue is to what happens when the configuration is invalid,
// so we'll just have to do our best
$out = [];
// start with the element lists
foreach (["allowElements", "blockElements", "dropElements"] as $opt) {
if (isset($config[$opt]) && is_array($config[$opt])) {
foreach ($config[$opt] as $el) {
if (is_string($el) && strlen($el)) {
// strings are assumed to be in the HTML namespace
$ns = self::HTML_NAMESPACE;
$name = $el;
} elseif (is_array($el) && strlen($el['name'] ?? "")) {
$name = $el['name'];
if (!array_key_exists("namespace", $el)) {
// the namespace key being missing means the HTML namespace
$ns = self::HTML_NAMESPACE;
} elseif (!isset($el['namespace'])) {
// the null namespace is also possible (but will never match in HTML documents)
$ns = self::NULL_NAMESPACE;
} elseif (is_string($el['namespace'])) {
// only use the namespace if it's a string
$ns = $el['namespace'];
} else {
// ignore any other value for the namespace (this is invalid)
continue;
}
}
// create any structures which might be missing
if (!isset($out[$opt])) {
$out[$opt] = [];
}
if (!isset($out[$opt][$ns])) {
$out[$opt][$ns] = [];
}
// add the element
$out[$opt][$ns][$name] = true;
}
}
}
// continue with attribute lists
foreach (["allowAttributes", "dropAttributes"] as $opt) {
if (isset($config[$opt]) && is_array($config[$opt])) {
foreach ($config[$opt] as $attr) {
if (is_array($attr) && strlen($attr['name'] ?? "" && isset($attr['elements']))) {
$name = $attr['name'];
if (!isset($attr['namespace'])) {
// the null namespace is assumed
$ns = self::NULL_NAMESPACE;
} elseif (is_string($attr['namespace'])) {
// only use the namespace if it's a string
$ns = $attr['namespace'];
} else {
// ignore any other value for the namespace (this is invalid)
continue;
}
// now check the list of elements
if ($attr['elements'] === "*") {
// the special string "*" means any element
$list = "*";
} elseif (is_array($attr['elements'])) {
// otherwise the element list is like the element lists handled above
$list = [];
foreach ($attr['elements'] as $el) {
if (is_string($el) && strlen($el)) {
// strings are assumed to be in the HTML namespace
$eNs = self::HTML_NAMESPACE;
$eName = $el;
} elseif (is_array($el) && strlen($el['name'] ?? "")) {
$eName = $el['name'];
if (!array_key_exists("namespace", $el)) {
// the namespace key being missing means the HTML namespace
$eNs = self::HTML_NAMESPACE;
} elseif (!isset($el['namespace'])) {
// the null namespace is also possible (but will never match in HTML documents)
$eNs = self::NULL_NAMESPACE;
} elseif (is_string($el['namespace'])) {
// only use the namespace if it's a string
$eNs = $el['namespace'];
} else {
// ignore any other value for the namespace (this is invalid)
continue;
}
}
// create any structures which might be missing
if (!isset($list[$eNs])) {
$list[$eNs] = [];
}
// add the element
$list[$eNs][$eName] = true;
}
} else {
// ignore any other value for the elements list (this is invalid)
continue;
}
if (!$list) {
// an empty element list is non-functional, so we can skip the attribute
continue;
}
// create any structures which might be missing
if (!isset($out[$opt])) {
$out[$opt] = [];
}
if (!isset($out[$opt][$ns])) {
$out[$opt][$ns] = [];
}
// add the attribute
$out[$opt][$ns][$name] = $list;
}
}
}
}
// finally handle the boolean options
foreach (["allowCustomElements", "allowUnknownMarkup", "allowComments", "allowProcessingInstructions", "nullNamespaceAsHtml"] as $opt) {
if (isset($config[$opt])) {
$out[$opt] = (bool) $config[$opt];
}
}
// use the normalized configuration
$this->config = $out;
}
}
/** Returns a normalized representation of the effective configuration */
public function getConfiguration(): array {
return $this->exportConfiguration($this->config);
}
/** Returns the default configuration */
public function getDefaultConfiguration(): array {
return $this->exportConfiguration(self::DEFAULT_CONF);
}
/** Converts a configuration from the internal representation to the external representation */
protected function exportConfiguration(array $config): array {
$out = [];
// start with the element lists
foreach (["allowElements", "blockElements", "dropElements"] as $opt) {
if (isset($config[$opt])) {
$out[$opt] = [];
ksort($config[$opt]);
foreach ($config[$opt] as $ns => $set) {
ksort($set);
foreach ($set as $el => $t) {
if ($ns === self::HTML_NAMESPACE) {
$out[$opt][] = $el;
} else {
$out[$opt][] = ['name' => $el, 'namespace' => $ns];
}
}
}
}
}
// continue with attribute lists
foreach (["allowAttributes", "dropAttributes"] as $opt) {
if (isset($config[$opt])) {
$out[$opt] = [];
ksort($config[$opt]);
foreach ($config[$opt] as $ns => $set) {
ksort($set);
foreach ($set as $attr => $elems) {
$list = [];
ksort($elems);
foreach ($elems as $eNs => $eSet) {
ksort($eSet);
foreach ($eSet as $el => $t) {
if ($eNs === self::HTML_NAMESPACE) {
$list[] = $el;
} else {
$list[] = ['name' => $el, 'namespace' => $eNs];
}
}
}
if ($ns === self::NULL_NAMESPACE) {
$out[$opt][] = ['name' => $attr, 'elements' => $list];
} else {
$out[$opt][] = ['name' => $attr, 'namespace' => $ns, 'elements' => $list];
}
}
}
}
}
// finally handle the boolean options
foreach (["allowCustomElements", "allowUnknownMarkup", "allowComments", "allowProcessingInstructions", "nullNamespaceAsHtml"] as $opt) {
if (isset($config[$opt])) {
$out[$opt] = $config[$opt];
}
}
// return the transformed configuration
return $out;
}
/** Sanitizes a document or document fragment according to the loaded configuration
*
* The returned document fragment contains clones of all valid nodes, leaving the original input untouched
*
* @param \DOMDocument|\DOMDocumentFragment $input The document or document fragment to sanitize
*/
public function sanitize(\DOMNode $input): \DOMDocumentFragment {
if (!($input instanceof \DOMDocument || $input instanceof \DOMDocumentFragment)) {
throw new \InvalidArgumentException("Argument \$input must be of type \DOMDocument|\DOMDocumentFragment");
}
# To sanitize a given input of type Document or DocumentFragment
# run these steps:
# Let fragment be the result of running the create a document fragment
# algorithm on input.
$fragment = $this->createDocumentFragment($input);
# Run the sanitize a document fragment algorithm on fragment.
$this->sanitizeDocumentFragment($fragment);
# Return fragment.
return $fragment;
}
/** Creates a copy of the input as a document fragment, which can then be safely manipulated
*
* @param \DOMDocument|\DOMDocumentFragment $input The input to clone
*/
protected function createDocumentFragment(\DOMNode $input): \DOMDocumentFragment {
assert($input instanceof \DOMDocument || $input instanceof \DOMDocumentFragment, new \Exception("Parameter \$input must be of type \DOMDocument|\DOMDocumentFragment"));
# To create a document fragment named fragment from an input of type
# Document or DocumentFragment, run these steps:
# Let node be null.
$node = null;
# Switch based on input’s type:
# If input is of type DocumentFragment, then:
# Set node to input.
# If input is of type Document, then:
# Set node to input’s documentElement.
if ($input instanceof \DOMDocumentFragment) {
$node = $input;
} elseif ($input instanceof \DOMDocument) {
$node = $input->documentElement;
}
# Let clone be the result of running clone a node on node with the
# clone children flag set.
$clone = $node->cloneNode(true);
# Let fragment be a new DocumentFragment whose node document is node’s
# node document.
$fragment = $node->ownerDocument->createDocumentFragment();
# Append the node clone to fragment.
$fragment->appendChild($clone);
# Return fragment.
return $fragment;
}
/** Iterates over a document fragment and sanitizes its nodes
*
* @param \DOMDocumentFragment $fragment The document fragment to sanitize
*/
protected function sanitizeDocumentFragment(\DOMDocumentFragment $fragment): void {
# To sanitize a document fragment named fragment with a Sanitizer
# sanitizer run these steps:
# Let m be a map that maps nodes to a sanitize action.
# Let nodes be a list containing the inclusive descendants of fragment, in tree order.
// Basically we won't be doing things this way. Rather than treating
// all of the fragment's nodes as a flat list, we'll walk the
// fragment and decide as we go, till have visited every node
$node = $fragment->firstChild;
# For each node in nodes:
while ($node) {
# Let action be the result of running the sanitize a node algorithm on node with sanitizer.
$action = $this->sanitizeNode($node);
assert(in_array($action, [self::ACTION_BLOCK, self::ACTION_DROP, self::ACTION_KEEP]), new \Exception("The result of sanitizing a node must be one of the three actions"));
# Set m[node] to action.
# For each node in nodes:
// Again, we're taking action one node at a time; m[node] is simply $action
if ($action === self::ACTION_DROP) {
# If m[node] is drop, remove node.
$victim = $node;
$node = $this->nextNode($node, false);
$victim->parentNode->removeChild($victim);
} else if ($action === self::ACTION_BLOCK) {
# If m[node] is block, create a DocumentFragment fragment,
# append all of node’s children to fragment, and replace
# node within node’s parent with fragment.
// This is a bit confusing because the variable name "fragment"
// is re-used; this is a different fragment from the input
// to this function
$victim = $node;
$node = $this->nextNode($node, true);
$frag = $victim->ownerDocument->createDocumentFragment();
while ($victim->firstChild) {
$frag->appendChild($victim->firstChild);
}
$victim->parentNode->replaceChild($victim, $frag);
} else {
# If m[node] is keep, do nothing.
$node = $this->nextNode($node, true);
}
}
}
/** Examines a node and returns one of the sanitization actions
*
* Attributes may be removed as part of this function
*
* @param \DOMNode $node The node to examine
*/
protected function sanitizeNode(\DOMNode $node): int {
# To sanitize a node named node with sanitizer run these steps:
# Assert: node is not a Document or DocumentFragment or Attr
# or DocumentType node.
assert(!in_array(get_class($node), ["DOMDocument", "DOMDocumentFragment", "DOMAttr", "DOMDocumentType"]), new \Exception("Invalid node Type ".get_class($node)));
if ($node instanceof \DOMElement) {
# If node is an element node:
# Let element be node.
$element = $node;
# For each attr in element’s attribute list:
foreach ($element->attributes as $attr) {
# Let attr action be the result of running the sanitize action
# for an attribute algorithm on attr and element.
$attrAction = $this->sanitizeAttribute($attr);
# If attr action is different from keep, remove an attribute
# supplying attr.
if ($attrAction !== self::ACTION_KEEP) {
$element->removeAttributeNode($attr);
}
}
# Run the steps to handle funky elements on element.
$this->handleFunkyElement($element);
# Let action be the result of running the sanitize action for an
# element on element.
# Return action.
return $this->sanitizeElement($element);
} elseif ($node instanceof \DOMComment) {
# If node is a Comment node:
# Let config be sanitizer’s configuration dictionary, or the default configuration if no configuration dictionary was given.
# If config’s allow comments option exists and |config|[allowComments] is true: Return keep.
if ($this->config['allowComments'] ?? self::DEFAULT_CONF['allowComments']) {
return self::ACTION_KEEP;
}
# Return drop.
return self::ACTION_DROP;
} elseif ($node instanceof \DOMText) {
# If node is a Text node: Return keep.
return self::ACTION_KEEP;
} else {
# Assert: node is a ProcessingInstruction
# Return drop.
//DEVIATION: we allow processing instructions by configuration just like comments
if ($this->config['allowProcessingInstructions'] ?? self::DEFAULT_CONF['allowProcessingInstructions']) {
return self::ACTION_KEEP;
}
return self::ACTION_DROP;
}
}
protected function sanitizeAttribute(\DOMAttr $attr): int {
# To determine the sanitize action for an attribute given a Sanitizer
# configuration dictionary config, run these steps:
# Let kind be attribute’s attribute kind.
$ns = $attr->namespaceURI;
$name = $attr->localName;
$eNs = $attr->ownerElement->namespaceURI;
$eName = $attr->ownerElement->localName;
$set = self::KNOWN_ATTRIBUTES[$ns][$name][$eNs] ?? [];
if (!array_intersect($set, [$eName, "*"])) {
# The attribute kind of an attribute is one of regular
# or unknown. Let attribute kind be:
# - unknown, if the [HTML] specification does not assign any
# meaning to attribute’s name.
$kind = self::KIND_UNKNOWN;
} else {
# - regular, otherwise.
$kind = self::KIND_REGULAR;
}
if ($kind === self::KIND_UNKNOWN && ($this->config['allowUnknownMarkup'] ?? self::DEFAULT_CONF['allowUnknownMarkup'])) {
# If kind is unknown and if config["allowUnknownMarkup"] does not exist or it config["allowUnknownMarkup"] is false: Return drop.
return self::ACTION_DROP;
} elseif ($kind === self::KIND_REGULAR) {}
# If kind is regular and attribute’s local name does not match any name in the baseline attribute allow list: Return drop.
# If attribute matches any attribute match list in config’s attribute drop list: Return drop.
# If attribute allow list exists in config:
# Then let allow list be |config|["allowAttributes"].
# Otherwise: Let allow list be the default configuration's attribute allow list.
# If attribute does not match any attribute match list in allow list: Return drop.
# Return keep.
}
/** Finds the next node in tree order after $node, if any
*
* @param \DOMNode $node The context node
* @param bool $considerChildren Whether or not child nodes are valid next nodes
*/
protected function nextNode(\DOMNode $node, bool $considerChildren): ?\DOMNode {
if ($node->hasChildNodes() && $considerChildren) {
return $node->firstChild;
}
$next = $node->nextSibling;
while (!$next) {
$node = $node->parentNode;
if (!$node) {
return null;
}
$next = $node->nextSibling;
}
return $next;
}
}