Source of validate.inc.php - Zabbix

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                info(_s('Incorrect value "%1$s" for "%2$s" field: must be between %3$s and %4$s, and have no more than %5$s digits after the decimal point.',
 
<?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/>.
**/
​
​
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('.$array.'))&&';
}
​
/**
 * @deprecated
 */
function HEX($var = null) {
    return 'preg_match("/^([a-zA-Z0-9]+)$/",{'.$var.'})&&';
}
​
function validate_port_list($str) {