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 could also try

$product = (isset($_POST['product'])) ? $_POST['product'] : null;

This will set $product to the $_POST value if it exists, or to null if not. Then you could try

if ($product) {
  do_something();
}

or access your array with

$products[$product];

I feel this way it makes your code that little bit easier on the eyes..