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<?php /** * Part of the Joomla Framework Utilities Package * * @copyright Copyright (C) 2005 - 2020 Open Source Matters, Inc. All rights reserved. * @license GNU General Public License version 2 or later; see LICENSE */ namespace Joomla\Utilities; /** * Utility class for building complex Regular Expressions * * @since __DEPLOY_VERSION__ */ abstract class RegEx { /** * Match the Regular Expression * * @param string $regex The Regular Expression * @param string $subject The string to check * * @return array Captured values */ public static function match($regex, $subject) { $match = array(); preg_match($regex, $subject, $match); return array_filter( $match, static function ($value, $key) { return !is_numeric($key) && !empty($value); }, ARRAY_FILTER_USE_BOTH ); } /** * Assign a key to an expression. * * @param string $regex The Regular Expression to match * @param string $as The name of the component, used as index * * @return string The modified Regular Expression */ public static function capture($regex, $as = null) { return '(?P<' . $as . '>' . $regex . ')'; } /** * Add a 'zero or one' quantifier to an expression. * * @param string $regex The Regular Expression to match * * @return string The modified Regular Expression */ public static function optional($regex) { return '(?:' . $regex . ')?'; } /** * Add a 'one or more' quantifier to an expression. * * @param string $regex The Regular Expression to match * * @return string The modified Regular Expression */ public static function oneOrMore($regex) { return '(?:' . $regex . ')+'; } /** * Add a 'zero or more' quantifier to an expression. * * @param string $regex The Regular Expression to match * * @return string The modified Regular Expression */ public static function noneOrMore($regex) { return '(?:' . $regex . ')*'; } /** * Define a list of alternative expressions. * * @param string|array $regexList A list of Regular Expressions to choose from * * @return string The modified Regular Expression */ public static function anyOf($regexList) { if (is_string($regexList)) { $regexList = func_get_args(); } return '(?:' . implode('|', $regexList) . ')'; } }
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