PHP performs ROT13 encoded function str_rot13 () on a string

Instance

Encode and decode the string:

<?phpecho str_rot13 ("Hello World"), echo "<br>", Echo str_rot13 ("Uryyb jbeyq"); >

Definition and usage

The str_rot13 () function performs ROT13 encoding on the string.

ROT13 encoding is to get each letter in the alphabet by moving forward 13 letters. Numeric and non-alphabetic characters remain unchanged.

Tip: Both encoding and decoding are done by the same function. If you take an encoded string as an argument, the original string is returned.

Grammar

STR_ROT13 (String)

Parameters	Describe
String	Necessary. Specifies the string to encode.

Technical details

return value:	Returns a ROT13 encoded string.
PHP version:	4.2.0+
Update log:	Before PHP 4.3, a string could be modified, as if it were passed by reference.

Instance

Encode and then decode the string:

<?phpecho str_rot13 ("I Love Shanghai"), echo "<br>", Echo str_rot13 ("V ybir FUNATUNV"); >

Results:

"; Echo str_rot13 ("V ybir FUNATUNV");?>