/** Returns the encoding of $codePoint as a byte string
/** Returns the encoding of $codePoints as a byte string
*
* If $codePoint is less than 0 or greater than 1114111, an exception is thrown
* If any element of $codePoints is less than 0 or greater than 1114111, an exception is thrown
*
* If $fatal is true, an exception will be thrown if the code point cannot be encoded into a character; otherwise HTML character references will be substituted
* If $fatal is true, an exception will be thrown if any code point cannot be encoded into a character; otherwise HTML character references will be substituted
*/
public static function encode(array $codePoints, bool $fatal = true): string;