My goal is to convert the _StringEncrypt UDF (inside of String.au3) to PHP. My initial search produced two threads within this forum: Alternative to _StringEncrypt() "Standard" RC4 from SkinnyWhiteGuy used… Posted by PsaltyDS http://www.autoitscript.com/forum/index.php?showtopic=66005 equal encrypt function autoit and php Posted by Cyber http://www.autoitscript.com/forum/index.php?showtopic=57294 Although the above threads revealed some significant facts, they did not produce a fin