~~~ protected function nonceStr($length = 32, $char = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'){ if(!is_int($length) || $length < 0){ return false; } $string = ''; for($i = $length; $i > 0; $i--) { $string .= $char[mt_rand(0, strlen($char) - 1)]; } $nonceStr = md5(uniqid(microtime(true),true)); return $nonceStr; } ~~~