/usr/share/php/Horde/Support/Randomid.php is in php-horde-support 2.1.5-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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/**
* Class for generating a 23-character random ID string. This string uses all
* characters in the class [-_0-9a-zA-Z].
*
* <code>
* $id = (string)new Horde_Support_Randomid();
* </code>
*
* Copyright 2010-2016 Horde LLC (http://www.horde.org/)
*
* @author Michael Slusarz <slusarz@horde.org>
* @category Horde
* @license http://www.horde.org/licenses/bsd BSD
* @package Support
*/
class Horde_Support_Randomid
{
/**
* Generated ID.
*
* @var string
*/
private $_id;
/**
* New random ID.
*/
public function __construct()
{
$this->_id = $this->generate();
}
/**
* Generate a random ID.
*/
public function generate()
{
$elts = array(
uniqid(),
mt_rand(),
getmypid(),
spl_object_hash($this)
);
if (function_exists('zend_thread_id')) {
$elts[] = zend_thread_id();
}
if (function_exists('sys_getloadavg') &&
($loadavg = sys_getloadavg())) {
$elts = array_merge($elts, $loadavg);
}
if (function_exists('memory_get_usage')) {
$elts[] = memory_get_usage();
$elts[] = memory_get_peak_usage();
}
shuffle($elts);
/* Base64 can have /, +, and = characters. Restrict to URL-safe
* characters. */
return substr(str_replace(
array('/', '+', '='),
array('-', '_', ''),
base64_encode(hash('sha1', serialize($elts), true))
), 0, 23);
}
/**
* Cooerce to string.
*
* @return string The random ID.
*/
public function __toString()
{
return $this->_id;
}
}
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