What you may not know about IF statements, ternary operators explained.

Traditional IF statements can take up more lines than you would like to. Especially when its only a small condition. Ternary operators take three arguements condition, true, false. This can be contructed on one line as opposed to the tranditional way which can take 4 lines (to look nice to read).

(condition) ? true : false;

A traditional statement may look like this:

if(is_numeric($_GET['id'])){  $id = $_GET['id'];}else{  $id = 0;}

The same statement as a ternary operator:

$id = is_numeric($_GET['id'])? $_GET['id'] : 0;