(PHP 4 >= 4.2.0, PHP 5, PHP 7)
Perform the rot13 transform on a string
string str_rot13 ( string $str )
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.
Parameters:
str
The input string.
Returns:
Returns the ROT13 version of the given string.
Examples:
str_rot13() example
<?php
echo str_rot13('PHP 4.3.0'); // CUC 4.3.0
?>
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