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<?php |
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/* |
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* This file is part of the league/commonmark package. |
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* |
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* (c) Colin O'Dell <[email protected]> |
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* |
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* Original code based on the CommonMark JS reference parser (https://bitly.com/commonmark-js) |
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* - (c) John MacFarlane |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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namespace League\CommonMark\Util; |
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final class Html5EntityDecoder |
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{ |
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public static function decode(string $entity): string |
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{ |
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if (\substr($entity, -1) !== ';') { |
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return $entity; |
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} |
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if (\substr($entity, 0, 2) === '&#') { |
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if (\strtolower(\substr($entity, 2, 1)) === 'x') { |
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return self::fromHex(\substr($entity, 3, -1)); |
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} |
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return self::fromDecimal(\substr($entity, 2, -1)); |
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} |
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return \html_entity_decode($entity, \ENT_QUOTES | \ENT_HTML5, 'UTF-8'); |
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} |
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/** |
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* @param mixed $number |
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* |
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* @return string |
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*/ |
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private static function fromDecimal($number): string |
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{ |
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// Only convert code points within planes 0-2, excluding NULL |
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if (empty($number) || $number > 0x2FFFF) { |
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return self::fromHex('fffd'); |
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} |
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$entity = '&#' . $number . ';'; |
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$converted = \mb_decode_numericentity($entity, [0x0, 0x2FFFF, 0, 0xFFFF], 'UTF-8'); |
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if ($converted === $entity) { |
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return self::fromHex('fffd'); |
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} |
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return $converted; |
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} |
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private static function fromHex(string $hexChars): string |
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{ |
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return self::fromDecimal(\hexdec($hexChars)); |
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} |
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} |
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thephpleague /
commonmark
