PHP move_uploaded_file() FAILS and i don't know why

Question

this is my code:

$uploaddir = '/temp/';
$uploadfile = $uploaddir.basename($_FILES['file']['name']);

if (move_uploaded_file($_FILES['file']['tmp_name'], $uploadfile))
    send_OK();
else
    send_error("ERROR - uploading file");

i have tried to upload with ftp_fput, ftp_put, move_uploaded_file, rename, copy and anything i can put my hands on. nothing seems to work.

i can't understand what is the problem since move_uploaded_file returns only true or false and no error code.

help??

Answer 1

Are you sure that the target directory has write permissions for world?ie,the third number in permission representation? The files uploaded by php are owned by and comes under the group www-data

You can change the ownership by

[sudo] chown -R www-data folder // change owner
[sudo] chown -R www-data:www-data folder // change group and owner

Answer 2

i don't know why

But you have to.

That's what error messages are for.
Do you see any error message when something goes wrong? If not, then you have to check error logs.

Add this line at the top of your code

error_reporting(E_ALL);

and this one, if it's your local (not live) server

ini_set('display_errors',1);

so you'll be able to see errors onscreen

For the file uploads you have to check $_FILES['file']['error']) first. it it's not 0, refer to the manual page for the actual message.