note 74110 added to function.str-rot13

I'm curious...how does this function know when to encode or decode? i.e. how does it know when i'm passing it an encoded string....I can't see any way for it to know! ---- Server IP: 216.194.113.175 Probable Submitter: 24.16.28.124 (proxied: 66.116.14.79) ---- Manual Page -- http://www.php.net/manual/en/function.str-rot13.php Edit -- https://master.php.net/note/edit/74110 Del: integrated -- https://master.php.net/note/delete/74110/integrated Del: useless -- https://master.php.net/note/delete/74110/useless Del: bad code -- https://master.php.net/note/delete/74110/bad+code Del: spam -- https://master.php.net/note/delete/74110/spam Del: non-english -- https://master.php.net/note/delete/74110/non-english Del: in docs -- https://master.php.net/note/delete/74110/in+docs Del: other reasons-- https://master.php.net/note/delete/74110 Reject -- https://master.php.net/note/reject/74110 Search -- https://master.php.net/manage/user-notes.php