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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.

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