$somevar = 5 + 5; // 10
$somevar = 5 - 5; // 0
$somevar = 5 + 5 - (5 + 5); // 0
$somevar = 5 * 5; // 25
$somevar = 10 * 5 - 5; // 45
$somevar = $somevar . "appended to end";
$somevar = false;
$somevar = !$somevar; // $somevar is now set to true
$somevar = 5;
$somevar++; // $somevar is now 6
$somevar--; // $somevar is now 5 again
++$somevar; // $somevar is 6
?>