simple php random string generator

phprandomString.md

 public function randomString($length) {
        $key = '';
        $keys = array_merge(range(0, 9), range('a', 'z'));
    
        for ($i = 0; $i < $length; $i++) {
            $key .= $keys[array_rand($keys)];
        }
    
        return $key;
    }
    ```