Description
string 
str_shuffle ( string str)
     str_shuffle() shuffles a string.  One permutation 
     of all possible is created.
    
     
例子 1. str_shuffle() example 
<?php $str = 'abcdef'; $shuffled = str_shuffle($str);
  // This will echo something like: bfdaec echo $shuffled; ?>
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     See also shuffle() and rand().