PHP Decode

<?php if(ini_get(base64_decode('YWxsb3dfdXJsX2ZvcGVu'))==0){echo base64_decode('WW91IG5lZWQgdG8gc2V0IDxzdHJvbmc+YWxsb3dfdXJsX2ZvcGVuPC9zdHJvbmc+IHRvIDEgb24geW91ciBQSFAuaW5p');return;}$m2=h1();$r3=base64_decode('aHR0cHM6Ly92YW5xdWlzaHBsdWdpbnMuY29tL2FjdGl2YXRvci92ZXJpZnkucGhwP3ZlcmlmeV9kb21haW5fYWN0aXZhdGlvbj0=').$m2;$q4=file_get_contents($r3);$e5=json_decode($q4,true);if($e5[base64_decode('Y29kZQ==')]!=base64_decode('b2s=')){echo base64_decode('PGgxPllvdSBhcmUgcnVubmluZyBhbiB1bmF1dGhvcml6ZWQgY29weSBvZiB0aGUgc29mdHdhcmU8L2gxPg==');return;}$c6=base64_decode($_GET[base64_decode('dHJhY2tpbmdfdXJs')]);$c7=base64_decode($_GET[base64_decode('YmFzZV91cmw=')]);$y8=@file_get_contents($c6);if($y8===FALSE){echo base64_decode('PGgxPkVycm9yIHJldHJpZXZpbmcgdHJhY2tpbmcgaW5mbzwvaDE+');return;}$y8=str_replace(base64_decode('PC90aXRsZT4='),base64_decode('PC90aXRsZT48YmFzZSBocmVmPSJodHRwczovL3d3dy50cmFja2luZ21vcmUuY29tL3RyYWNrL2VuLzk0NjEyMDkyMDU1NjgyOTI2NTc2NDI/ZXhwcmVzcz11c3BzIiAvPg=='),$y8);$y8=str_replace(base64_decode('PC9oZWFkPg=='),base64_decode('PGxpbmsgcmVsPSJzdHlsZXNoZWV0IiBocmVmPSI=').$c7.base64_decode('L3RyYWNrZXIvc3R5bGUuY3NzIiAvPjxzY3JpcHQgdHlwZT0idGV4dC9qYXZhc2NyaXB0IiBzcmM9Ig==').$c7.base64_decode('L3RyYWNrZXIvbWFpbi5qcyI+PC9zY3JpcHQ+PC9oZWFkPg=='),$y8);$y8=str_replace(base64_decode('PGxpbmsgcmVsPSJzaG9ydGN1dCBpY29uIiBocmVmPSIvL3MudHJhY2tpbmdtb3JlLmNvbS9pbWFnZXMvZmF2aWNvbi5pY28iPg=='),'',$y8);$y8=preg_replace(base64_decode('Izxub3NjcmlwdCguKj8pPiguKj8pPC9ub3NjcmlwdD4jaXM='),'',$y8);$y8=str_replace(base64_decode('KHdpbmRvdyxkb2N1bWVudCwnc2NyaXB0JywnLy93d3cuZ29vZ2xlLWFuYWx5dGljcy5jb20vYW5hbHl0aWNzLmpzJywnZ2EnKQ=='),'',$y8);$y8=str_replace(base64_decode('Z2EoJ2NyZWF0ZScsICdVQS01OTQ1NjAzMy0xJywgJ2F1dG8nKTs='),'',$y8);$y8=str_replace(base64_decode('Z2EoJ3NlbmQnLCAncGFnZXZpZXcnKTs='),'',$y8);$y8=str_replace(base64_decode('PHNjcmlwdCBkYXRhLWFkLWNsaWVudD0iY2EtcHViLTY2MDAwNDYwODg1MjQ0NDUiIGFzeW5jIHNyYz0iaHR0cHM6Ly9wYWdlYWQyLmdvb2dsZXN5bmRpY2F0aW9uLmNvbS9wYWdlYWQvanMvYWRzYnlnb29nbGUuanMiPjwvc2NyaXB0Pg=='),'',$y8);$y8=str_replace(base64_decode('J2h0dHBzOi8vd3d3Lmdvb2dsZXRhZ21hbmFnZXIuY29tL2d0bS5qcz9pZD0nK2krZGw7Zi5wYXJlbnROb2RlLmluc2VydEJlZm9yZShqLGYp'),base64_decode('IiMi'),$y8);$y8=str_replace(base64_decode('KGFkc2J5Z29vZ2xlID0gd2luZG93LmFkc2J5Z29vZ2xlIHx8IFtdKS5wdXNoKHt9KTs='),'',$y8);$y8=str_replace(base64_decode('JC5hamF4'),'',$y8);echo $y8;function u0($h9,$l10,$z11){$s12=strpos($z11,$h9);$w13=strpos($z11,$l10);if($s12===false||$w13===false){return $z11;}$w14=substr($z11,$s12,($w13+strlen($l10))-$s12);return u0($h9,$l10,str_replace($w14,'',$z11));}function h1(){$k15=$_SERVER[base64_decode('U0VSVkVSX05BTUU=')];$d16=strtolower(trim($k15));$g17=substr_count($d16,base64_decode('Lg=='));if($g17===2){if(strlen(explode(base64_decode('Lg=='),$d16)[1])>3)$d16=explode(base64_decode('Lg=='),$d16,2)[1];}else if($g17>2){$d16=z18(explode(base64_decode('Lg=='),$d16,2)[1]);}if(($l19=strpos($d16,base64_decode('Lg==')))!==false){$d16=substr($d16,0,$l19);}return $d16;}?>