$HTTP_RAW_POST_DATA

$HTTP_RAW_POST_DATA used to contain the raw POST data of an HTTP request.

Since PHP 7.0, php://input should be used instead of $HTTP_RAW_POST_DATA.

<?php

    // $a->file was filled with $_FILES at some point
    move_uploaded_file($a->file['tmp_name'], $target);

?>

Documentation

Removed in PHP