PHP reversible encryption methods and principles

This article mainly introduces the methods and principles of PHP reversible encryption. Interested friends can refer to it. I hope it will be helpful to everyone.

The PHP code is as follows:

key); } return $txt=urlencode(base64_encode(urlencode($txt))); } function decode($txt){ $txt=urldecode(base64_decode($txt)); for($i=0;$ikey); } return $txt; } } ?>

discuz encryption and decryption:

0)&&substr($result,10,16)==substr(md5(substr($result,26).$keyb),0,16)){ returnsubstr($result,26); }else{ return''; } }else{ return $keyc.str_replace('=','',base64_encode($result)); } } ?>

Summary:The above is the entire content of this article , I hope it can be helpful to everyone’s study.

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