debugging move_uploaded_file in cakephp

I am using move_uploaded_file to upload files in cakephp, this was working for a while, but suddenly it broke. (I don't seem to see any recent changes in svn that relate to this issue, so I can't just revert them).

The problem is, move_uploaded_file is returning false, but it isn't telling me what's wrong. I tried doing:

error_reporting(E_ALL);
ini_set("display_errors", 1);

but it isn't accomplishing anything. No errors are being reported.

if (!file_exists($folder_url . '/' . $filename))
{
    /开发者_Go百科/ create full filename
    $full_url = $folder_url . '/' . $filename;
    $url = $rel_url . '/' . $filename;
    // upload the file
    error_reporting(E_ALL);
    ini_set("display_errors", 1);
    $success = move_uploaded_file($file['tmp_name'], $url);
    $result['success'] = $success;
    $result['debug']['url'] = $url;
    $result['debug']['full_url'] = $full_url;
    $result['debug']['file'] = $folder_url . '/' . $filename;
}

Hosting server is in ubuntu server 9.10 running LAMP, development machine is windows 7 running XAMPP

EDIT:

I changed the activate error reporting to before the upload and it still doesn't work:

error_reporting(E_ALL);
ini_set("display_errors", 1);
$success = move_uploaded_file($file['tmp_name'], $url);

In Cakephp Config:

Configure::write('debug', 2);
Configure::write('log', E_ALL ^ E_NOTICE);

EDIT 2:

I did a scandir on $rel_url and it shows up the files just fine

[test2] => Array
    (
        [0] => .
        [1] => ..
        [2] => 1.jpg
        [3] => 10.jpg
        [4] => 16.jpg
        [5] => 2.jpg
        [6] => 2010-12-12-0142065.jpg
        [7] => 22.jpg
        [8] => 3.jpg
        [9] => 4.jpg
        [10] => 5.jpg
        [11] => 6.jpg
        [12] => 7.jpg
        [13] => 8.jpg
        [14] => 9.jpg
        [15] => error.png
    )

[debug] => Array
(
    [url] => img/recipes/555.jpg
    [rel_url] => img/recipes
)

---

You say that there were updates in Subversion. I think that you did an svn checkout or svn update that messed up the permissions on the directory that you are trying to upload to. Check your permissions.

BTW: move_uploaded_file() is a native PHP function. This has nothing to do with CakePHP.

---

If file is been uploaded, and that the directory is 777, it might be that the paths are not correct.

Did you try to put a file in your target directory, and check with file_exists, if your $url is correct?

I had another problem once with the file filename. I don't remember exactly all the details, but it had to do with accented character in the filename.

EDIT

try with absolute url, that's what I do

$url = WWW_ROOT.'img/' . $filename;

---

Have you checked if the directory owner is www-data ? try :

chown -R www-data:www-data /your/upload/folder/