   #PHP Manual String functions str_replace str_shuffle

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                                   str_rot13

   (PHP 4 >= 4.2.0)
   str_rot13 -- Perform the rot13 transform on a string

Description

   string str_rot13 ( string str)

   This function performs the ROT13 encoding on the str argument and
   returns the resulting string. The ROT13 encoding simply shifts every
   letter by 13 places in the alphabet while leaving non-alpha characters
   untouched. Encoding and decoding are done by the same function,
   passing an encoded string as argument will return the original
   version.

   Example 1. rot13() example
   <?php
   echo str_rot13('PHP 4.3.0'); // CUC 4.3.0
   ?>

     Note: The behaviour of this function was buggy until PHP 4.3.0.
     Before this, the str was also modified, as if passed by reference.
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