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.

**/

​

​

function unset_request($key) {

    unset($_GET[$key], $_POST[$key], $_REQUEST[$key]);

}

​

/**

 * Validation expression for min/max number range.

 *

 * @param int    $min

 * @param int    $max

 * @param string $var

 *

 * @return string

 */

function BETWEEN($min, $max, $var = '') {

    return '({'.$var.'}>='.$min.'&&{'.$var.'}<='.$max.')&&';

}

​

/**

 * Validation expression for min/max range and max number of digits after the decimal point.

 *

 * @param int    $min

 * @param int    $max

 * @param int    $scale

 * @param string $var

 *

 * @return string

 */

function BETWEEN_DBL($min, $max, $scale, $var = '') {

    return BETWEEN($min, $max, $var).'(round({'.$var.'},'.$scale.')=={'.$var.'})&&';

}

​

function IN($array, $var = '') {

    if (is_array($array)) {

        $array = implode(',', $array);

    }

​

    return 'str_in_array({'.$var.'},array('.$array.'))&&';

}

​

function HEX($var = null) {

    return 'preg_match("/^([a-zA-Z0-9]+)$/",{'.$var.'})&&';

}

​

function validate_port_list($str) {

    foreach (explode(',', $str) as $port_range) {

        $port_range = explode('-', $port_range);

        if (count($port_range) > 2) {

            return false;

        }

        foreach ($port_range as $port) {

            if (!validatePortNumber($port)) {

                return false;

            }

        }

    }

    return true;

}

​

function calc_exp($fields, $field, $expression) {

    if (strpos($expression, '{}') !== false) {

        if (!isset($_REQUEST[$field])) {

            return false;

        }

        if (!is_array($_REQUEST[$field])) {

            $expression = str_replace('{}', '$_REQUEST["'.$field.'"]', $expression);

        }

        if (is_array($_REQUEST[$field])) {

            foreach ($_REQUEST[$field] as $key => $val) {

                if (!preg_match('/^([a-zA-Z0-9_]+)$/', $key)) {

                    return false;