Help with quiz, fail to understand this...

Hey Eitay,

I'll see if I can explain why the answer is "B" --> Let's break down the code:

<?php

$flavors = array();

$flavors[1] = "Cake Batter";

$flavors[2] = "Cookie Dough";

if (isset($_GET["id"])) {

    if (isset($flavors[$_GET["id"]])) {

        echo $flavors[$_GET["id"]];

    } else {

        echo "B";

    }

} else {

    echo "A";

}

?>

So, if you add the extra variable in the Web Address (this would be a GET request, as a GET request is passed in through the URL). The first if statement will return TRUE because the GET variable is now set. From this we now know that the second else statement in the code will not be executed, as this is the else statement for the first if statement (and that has returned TRUE, so now we move to inside of that first if statement.

Now the second if statement is checking to see if the flavor id passed in is set to one of the flavor IDs in the $flavor array. Right now, there are only 2 items added to that arrary with a set ID. So, we have an ID with 1 and and ID with 2. However, 9 is being passed into the URL GET request, so it checks and the first if says "yes it's set", but the second if says "no, there is no 9 here" and throws it to the else statement for that if statement that has returned FALSE. Therefore, that else gets executed and "B" is echoed out.

I hope that helps to make sense. Keep coding!