Cannot move_uploaded_file to /tmp

Question

Here my code of uploads.php:

<?php
ini_set('display_errors', 1);
error_reporting(E_ALL);

$uploads_dir = '/tmp' . DIRECTORY_SEPARATOR;
$tmp_name = $_FILES["file"]["tmp_name"];
$name = basename($_FILES["file"]["name"]);
echo move_uploaded_file($tmp_name, $uploads_dir . $name);

It returns 1 (aka true) but the file is not copied to /tmp. If I set $uploads_dir to a different directory with permissions 777 it works. If the target directory is wrong or does not have the right permissions I get an error message.

The /tmp directory as the correct permission I guess:

$ ls -l / | grep tmp
drwxrwxrwt  21 root root      20480 apr 21 17:39 tmp

so why it returns true but does not copy anything there?

Answer 1

If your tmp directory is in the same level of the file uploads.php change:

$uploads_dir = '/tmp' . DIRECTORY_SEPARATOR;

to this:

$uploads_dir = __DIR__ . '/tmp' . DIRECTORY_SEPARATOR;

Or if the folder it's in the root level (aka / ) You need to descend to the same level like:

$uploads_dir = __DIR__ . '/../../tmp' . DIRECTORY_SEPARATOR;

I hope it's help you.