Lol.. what this shit is about? just replace a with 4, e with 3 and so on and you use $replace as replace only the first match and not $replacex that will replace all the matches? I understand if you will use $encode and the client will use $decode.. but, really, if you name this script as encoded talk, then the world will be an elephant :D

Replace / with $comchar , because if someone change in Options the char / to - or something else.. then your script will become null :)