/*
in php, ? is the 'Ternary Operator'.
The expression (expr1) ? (expr2) : (expr3) evaluates
to expr2 if expr1 evaluates to true, and expr3 if
expr1 evaluates to false.
It is possible to leave out the middle part of the
ternary operator. Expression expr1 ?: expr3 evaluates
to the result of expr1 if expr1 evaluates to true,
and expr3 otherwise. expr1 is only evaluated once in
this case.
*/
<?php
// Example usage for: Ternary Operator
$action = (empty($_POST['action'])) ? 'default' : $_POST['action'];
// The above is identical to this if/else statement
if (empty($_POST['action'])) {
$action = 'default';
} else {
$action = $_POST['action'];
}
?>