str_rot13 Perform the rot13 transform on a string &reftitle.description; stringstr_rot13 stringstr 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. &reftitle.parameters; str The input string. &reftitle.returnvalues; Returns the ROT13 version of the given string. &reftitle.examples; ]]> &reftitle.changelog; &Version; &Description; 4.3.0 The behaviour of this function was fixed. Before this fix, the str was also modified, as if it was passed by reference.