Question

I followed this tutorial: http://php.about.com/od/finishedphp1/ss/rating_script.htm

but when i run it i get

Notice: Undefined variable: mode in C:\xampp\htdocs\xxxx\index.php on line 7.

Does anyone know what could possibly be wrong?

Answer 1

If you are copying their script exactly, the issue is found on step 3 – http://php.about.com/od/finishedphp1/ss/rating_script_3.htm

//We only run this code if the user has just clicked a voting link
if ( $mode=="vote") 

You are checking an undefined variable – $mode. You need to define it first, with something like –

//We only run this code if the user has just clicked a voting link
$mode = isset($_GET['mode']) ? htmlentities($_GET['mode']) : '';
if ( $mode=="vote")

Note: I agree @azizpunjani, this code is outdated, and has many issues. You should look for a script that is using mysqli_ or PDO, not mysql_ functions.