Question

If I have 30 session variables and I want to do an if statement to only 10 of them.

if (empty($_SESSION['XYZ'])) {
   $_SESSION['XYZ'] = 0;
}

what should I do? Do I call an if statement after every session variables that i needed for?

Answer 1

Consider putting the names of the keys in an array and then looping through with foreach.

$keys = array('x','y','z');
foreach ($keys as $key)
{
    if (empty($_SESSION[$key])
    {
        // do stuff
    }
}

An advantage is you can quickly add or remove keys to check.