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