Question

I use @ mark in many block (where necessary). I heard it causes loss of performance.Is it true?If it is true, Is there another way for @ function

Answer 1

You can suppress a warning like this:

@$value = $_GET['value'];

but you can also just check if the key exists

if (isset($_GET['value']))
  $value = $_GET['value'];

or

if (array_key_exists('value', $_GET))
  $value = $_GET['value'];

I prefer the latter, because I think it’s the purest form.