Zabbix

<?php

/*

** Copyright (C) 2001-2025 Zabbix SIA

**

** This program is free software: you can redistribute it and/or modify it under the terms of

** the GNU Affero General Public License as published by the Free Software Foundation, version 3.

**

** 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 Affero General Public License for more details.

**

** You should have received a copy of the GNU Affero General Public License along with this program.

** If not, see <https://www.gnu.org/licenses/>.

**/

​

class CRegexValidator extends CValidator

{

​

    /**

     * Error message if the is not a string.

     *

     * @var string

     */

    public $messageInvalid;

​

    /**

     * Error message if the value is invalid

     *

     * @var string

     */

    public $messageRegex;

​

    /**

     * Check if regular expression is valid

     *

     * @param string $value

     *

     * @return bool

     */

    public function validate($value) {

        if (!is_string($value) && !is_numeric($value)) {

            $this->error($this->messageInvalid);

            return false;

        }

​

        // escape '/' since Zabbix server treats them as literal characters.

        $value = str_replace('/', '\/', $value);

​

        // validate through preg_match

        $error = false;

​

        set_error_handler(function ($errno, $errstr) use (&$error) {

            if ($errstr != '') {

                $error = $errstr;

            }

        });

​

        preg_match('/'.$value.'/', '');

​

        restore_error_handler();

​

        if ($error) {

            $this->error(

                $this->messageRegex,

                $value,

                str_replace('preg_match(): ', '', $error)

            );

            return false;

        }

​

        return true;

    }

}