str_shuffle(); A shorthand for generating random strings.

shuffle.php

<?php
  echo str_shuffle('ABCDEFGH');
  // may returns HGACBDEF
  
  // unicode shuffle (qeremy [atta] gmail [dotta] com)
  function str_shuffle_unicode($str) {
    $tmp = preg_split("//u", $str, -1, PREG_SPLIT_NO_EMPTY);
    shuffle($tmp);
    return join("", $tmp);
  }
  
  echo str_shuffle_unicode('سلام');
  // may returns مسال
  
  /**     A little snippet, collected by Ehsan      **/
  /** We Love PHP and any software writed with this **/
  ?>