Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

PHP Build a Basic PHP Website (2018) Listing and Sorting Inventory Items Working with Functions

Edward Lee
Edward Lee
1,805 Points
Posted by Edward Lee
Edward Lee
1,805 Points

Can this questions can be broken down and explained?

What does the following code display?

$numbers = array(1,2,3,4);
$total = count($numbers);
$sum = 0;
$loop = 0;

foreach($numbers as $number) {
    $loop = $loop + 1;
    if ($loop < $total) {
        $sum = $sum + $number;
    }
}

echo $sum;

1 Answer

KRIS NIKOLAISEN
KRIS NIKOLAISEN
54,972 Points

$numbers = array(1,2,3,4)

$total = count($numbers) = 4

For each:

Loop = 1 ; if 1 < 4 then sum = 0+1 =1

Loop = 2; if 2 < 4 then sum = 1+2 =3

Loop = 3; if 3 < 4 then sum = 3 + 3 = 6

Loop = 4; if 4 < 4 (not true)

Sum = 6

Edward Lee
Edward Lee
1,805 Points
Edward Lee
Edward Lee
1,805 Points

Thanks for breaking down that question it really helped A LOT. Here's a similar question I'm still struggling with... can you break this down as well?

$numbers = array(1,2,3,4);
$total = count($numbers);
$sum = 0;
$output = "";
$loop = 0;

foreach($numbers as $number) {
    $loop = $loop + 1;
    if ($loop < $total) {
        $output = $number . $output;
    }
}

echo $output;

?>