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has_enabled_groups() ) { if ( isset( $_COOKIE[ W3TC_REFERRER_COOKIE_NAME ] ) ) { $http_referrer = htmlspecialchars( $_COOKIE[ W3TC_REFERRER_COOKIE_NAME ] ); // phpcs:ignore } elseif ( isset( $_SERVER['HTTP_REFERER'] ) ) { $http_referrer = filter_var( $_SERVER['HTTP_REFERER'], FILTER_SANITIZE_URL ); // phpcs:ignore setcookie( W3TC_REFERRER_COOKIE_NAME, $http_referrer, 0, '/' /* not defined yet Util_Environment::network_home_url_uri()*/ ); } } elseif ( isset( $_COOKIE[ W3TC_REFERRER_COOKIE_NAME ] ) ) { setcookie( W3TC_REFERRER_COOKIE_NAME, '', 1 ); } return $http_referrer; } /** * Verifies if the HTTP referrer matches a specified group comparison value. * * Uses a static reference to store the HTTP referrer for efficient reuse. * Matches the referrer against a regular expression provided in `$group_compare_value`. * * @param string $group_compare_value The regex pattern to compare against the HTTP referrer. * * @return bool True if the referrer matches the provided pattern, false otherwise. */ public function group_verifier( $group_compare_value ) { static $http_referrer = null; if ( is_null( $http_referrer ) ) { $http_referrer = $this->get_http_referrer(); } return $http_referrer && preg_match( '~' . $group_compare_value . '~i', $http_referrer ); } /** * Retrieves the group HTTP referrer. * * This method acts as a wrapper for `get_http_referrer`. * * @return string The sanitized HTTP referrer. */ public function do_get_group() { return $this->get_http_referrer(); } }