/**
* Create random value on give criteria
*
* @param int $length
* @param string $type (mixed, chars, digits)
* @return string
*/
function generateRandomString($length, $type = null)
{
if (!Reg::get('packageMgr')->isPluginLoaded('Crypto', 'Crypto')) {
throw new RuntimeException("Crypto plugin is not loaded!");
}
if ($length === null) {
$length = 12;
}
if ($type === null) {
$type = 'mixed';
}
if ($type != 'mixed' && $type != 'chars' && $type != 'digits') {
return false;
}
$rand_value = '';
while (strlen($rand_value) < $length) {
if ($type == 'digits') {
$char = Crypto::s_rand(0, 9);
} else {
$char = chr(Crypto::s_rand(0, 255));
}
if ($type == 'mixed') {
if (preg_match('/^[a-z0-9]$/i', $char)) {
$rand_value .= $char;
}
} elseif ($type == 'chars') {
if (preg_match('/^[a-z]$/i', $char)) {
$rand_value .= $char;
}
} elseif ($type == 'digits') {
if (preg_match('^[0-9]$', $char)) {
$rand_value .= $char;
}
}
}
return $rand_value;
}
