Description:
------------
When selecting a file to upload files which are massively larger than the upload limit cause the super global arrays $_POST, $_GET, $_REQUEST and $_FILES to be empty.

Reproduce code:
---------------
form.html
<form enctype="multipart/form-data" action="upload.php" method="POST">
    <input type="hidden" name="test" value="value" />
    Send this file: <input name="userfile" type="file" />
    <input type="submit" value="Send File" />
</form>

upload.php
<?php
print_r($_POST);
print_r($_REQUEST);

$uploaddir = '/var/www/uploads/';
$uploadfile = $uploaddir . basename($_FILES['userfile']['name']);

echo '<pre>';
if (move_uploaded_file($_FILES['userfile']['tmp_name'], $uploadfile)) {
   echo "File is valid, and was successfully uploaded.\n";
} else {
   echo "Possible file upload attack!\n";
}

print "</pre>";

?> 

Expected result:
----------------
array("test" => "value")
array("test" => "value")
Possible file upload attack! (due to the fact that the file is too large)

Actual result:
--------------
array()
array()
Possible file upload attack!