/
Utils.php
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/
Utils.php
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<?php
/*
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 3 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, see <http://www.gnu.org/licenses/>.
*/
/**
* @copyright 2010 onwards James McQuillan (http://pdyn.net)
* @author James McQuillan <james@pdyn.net>
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
namespace pdyn\base;
class Utils {
/**
* Determine if we are in PHP CLI or not.
*
* @return bool True if we are in CLI, false otherwise.
*/
public static function is_cli_env() {
return (php_sapi_name() === 'cli') ? true : false;
}
/**
* Generate a random string of letters and numbers of a specific length.
*
* @param int $l The desired length of the string.
* @return string The generated string.
*/
public static function genRandomStr($l) {
$p = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
$s = '';
for ($i = 0; $i < $l; $i++) {
$s .= $p[mt_rand(0, (mb_strlen($p) - 1))];
}
return $s;
}
/**
* Generate a guaranteed unique value of a specified length.
* @param int|bool $length A desired length, or false to use uniqid length.
* @return string The unique string.
*/
public static function uniqid($length = false) {
if ($length <= 13) {
return uniqid();
}
$uniq = strrev(str_replace('.', '', uniqid('', true)));
$uniqlen = mb_strlen($uniq);
if ($length === false || $length === $uniqlen) {
return $uniq;
} elseif ($length < $uniqlen) {
return mb_substr($uniq, 0, $length);
} else {
return \pdyn\base\Utils::genRandomStr(($length - mb_strlen($uniq))).$uniq;
}
}
}