PHP: Avoid undefined index?

Question

Every time a POST value is not equal to the list of values set in an array will return: Undefined Index error, I made an if statement but is not working.

Here\'s the

Answer 1

You should first check to see if $_POST['product'] is set with isset(), like:

if( isset($_POST['product']) ){
    // Do something with $_POST['product']
}

That should suppress the warning.