Zabbix

<?php

/*

** Zabbix

** Copyright (C) 2001-2022 Zabbix SIA

**

** This program is free software; you can redistribute it and/or modify

** it under the terms of the GNU General Public License as published by

** the Free Software Foundation; either version 2 of the License, or

** (at your option) any later version.

**

** This program is distributed in the hope that it will be useful,

** but WITHOUT ANY WARRANTY; without even the implied warranty of

** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

** GNU General Public License for more details.

**

** You should have received a copy of the GNU General Public License

** along with this program; if not, write to the Free Software

** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

**/

​

​

/**

 * Class for regular expressions and Zabbix global expressions.

 * Any string that begins with '@' is treated as Zabbix expression.

 * Data from Zabbix expressions is taken from DB, and cached in static variable.

 *

 * @throws Exception

 */

class CGlobalRegexp {

​

    const ERROR_REGEXP_NOT_EXISTS = 1;

​

    /**

     * Determine if it's Zabbix expression.

     *

     * @var bool

     */

    protected $isZabbixRegexp;

​

    /**

     * If we create simple regular expression this contains itself as a string,

     * if we create Zabbix expression this contains array of expressions taken from DB.

     *

     * @var array|string

     */

    protected $expression;

​

    /**

     * Cache for Zabbix expressions.

     *

     * @var array

     */

    private static $_cachedExpressions = [];

​

    /**

     * Initialize expression, gets data from db for Zabbix expressions.

     *

     * @param string $regExp

     *

     * @throws Exception

     */

    public function __construct($regExp) {

        if ($regExp[0] == '@') {