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!

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 Array Keys

11,877 Points

Cant complete the challenge

Take a look at my code, I have tried everything.

I am putting all the $id's into an array called $isbn[], I tried using it as a variable. I tried it on my computer and it works, can you copy paste the answer its killing me. lol.



$books["978-0743261690"] = "Gilgamesh";
$books["978-0060931957"] = "The Odyssey";
$books["978-0192840509"] = "Aesop's Fables";
$books["978-0520227040"] = "Mahabharta";
$books["978-0393320978"] = "Beowulf";

    <title>Five Great Books</title>
    <h1>Five Great Books</h1>
      <?php foreach($books as $id => $book) { ?>
            <?php $isbn[]=$id; ?>
            <li><?php echo $book . ' - '. $id; ?></li>
            <?php } 
           // var_dump ($isbn); ?>

            <?php $keys_books[] = array_keys($books); 


2 Answers

Paul Yabsley
Paul Yabsley
46,713 Points

Hi Javier

I think it is a bit simpler than what you've done.

When using a foreach to iterate through an array, it is possible get both the key and the value at the same time. It looks like this:

foreach ($array as $key => $value)  {
  echo $key; // This will echo the key of each array item
  echo $value; // This will echo the value of each array item


Try adjusting your foreach statement to be foreach ($books as $isbn => $book). When I did that in the challenge it accepted the answer.

11,877 Points

Thanks a lot, I understand now. I appreciate it thanks

Paul Yabsley
Paul Yabsley
46,713 Points

Cool, no worries, glad to help.