public function createElement($name, $value = null): Element {
# The createElement(localName, options) method steps are:
// DEVIATION: We cannot follow the createElement parameters per the DOM spec
// because we cannot change the parameters from \DOMDOcument. This is okay
// because $options is currently just for the is attribute for custom elements.
// Since this implementation does not have support for scripting that argument
// would be useless anyway. Equally, the $value parameter from PHP's DOM is
// useless, so it is disabled in this implementation as it doesn't exist in the
// DOM spec.
if ($value !== null) {
throw new DOMException(DOMException::NOT_SUPPORTED, 'the value parameter is not in the official DOM specification; create a text node and append instead');
}
# 1. If localName does not match the Name production, then throw an
# "InvalidCharacterError" DOMException.
if (preg_match('/^[:A-Z_a-z\x{C0}-\x{D6}\x{D8}-\x{F6}\x{F8}-\x{2FF}\x{370}-\x{37D}\x{37F}-\x{1FFF}\x{200C}-\x{200D}\x{2070}-\x{218F}\x{2C00}-\x{2FEF}\x{3001}-\x{D7FF}\x{F900}-\x{FDCF}\x{FDF0}-\x{FFFD}\x{10000}-\x{EFFFF}][:A-Z_a-z\x{C0}-\x{D6}\x{D8}-\x{F6}\x{F8}-\x{2FF}\x{370}-\x{37D}\x{37F}-\x{1FFF}\x{200C}-\x{200D}\x{2070}-\x{218F}\x{2C00}-\x{2FEF}\x{3001}-\x{D7FF}\x{F900}-\x{FDCF}\x{FDF0}-\x{FFFD}\x{10000}-\x{EFFFF}-\.0-9\x{B7}\x{0300}-\x{036F}\x{203F}-\x{2040}]*$/u', $name) !== 1) {
throw new DOMException(DOMException::INVALID_CHARACTER);
}
# 2. If this is an HTML document, then set localName to localName in ASCII
# lowercase.
// This will always be an HTML document
$name = strtolower($name);
# 3. Let is be null.
# 4. If options is a dictionary and options["is"] exists, then set is to it.
# 5. Let namespace be the HTML namespace, if this is an HTML document or this’s
# content type is "application/xhtml+xml"; otherwise null.
# 6. Return the result of creating an element given this, localName, namespace,
# null, is, and with the synchronous custom elements flag set.
// DEVIATION: There is no scripting in this implementation.
try {
if ($name !== 'template') {
$e = parent::createElement($name);
} else {
$e = new HTMLTemplateElement($this, $name);
}
return $e;
} catch (\DOMException $e) {
// The element name is invalid for XML
// Replace any offending characters with "UHHHHHH" where H are the
// uppercase hexadecimal digits of the character's code point
public function createElementNS($namespaceURI, $qualifiedName, $value = null): Element {
# The internal createElementNS steps, given document, namespace, qualifiedName,
# and options, are as follows:
// DEVIATION: We cannot follow the createElement parameters per the DOM spec
// because we cannot change the parameters from \DOMDOcument. This is okay
// because $options is currently just for the is attribute for custom elements.
// Since this implementation does not have support for scripting that argument
// would be useless anyway. Equally, the $value parameter from PHP's DOM is
// useless, so it is disabled in this implementation as it doesn't exist in the
// DOM spec.
if ($value !== null) {
throw new DOMException(DOMException::NOT_SUPPORTED, 'the value parameter is not in the official DOM specification; create a text node and append instead');
