name : ElementParser.php <?php /* * This file is part of the Symfony package. * * (c) Fabien Potencier <fabien@symfony.com> * * For the full copyright and license information, please view the LICENSE * file that was distributed with this source code. */ namespace Symfony\Component\CssSelector\Parser\Shortcut; use Symfony\Component\CssSelector\Node\ElementNode; use Symfony\Component\CssSelector\Node\SelectorNode; use Symfony\Component\CssSelector\Parser\ParserInterface; /** * CSS selector element parser shortcut. * * This component is a port of the Python cssselect library, * which is copyright Ian Bicking, @see https://github.com/SimonSapin/cssselect. * * @author Jean-François Simon <jeanfrancois.simon@sensiolabs.com> * * @internal */ class ElementParser implements ParserInterface { public function parse(string $source): array { // Matches an optional namespace, required element or `*` // $source = 'testns|testel'; // $matches = array (size=3) // 0 => string 'testns|testel' (length=13) // 1 => string 'testns' (length=6) // 2 => string 'testel' (length=6) if (preg_match('/^(?:([a-z]++)\|)?([\w-]++|\*)$/i', trim($source), $matches)) { return [new SelectorNode(new ElementNode($matches[1] ?: null, $matches[2]))]; } return []; } }