Welcome to the Treehouse Community

The Treehouse Community is a meeting place for developers, designers, and programmers of all backgrounds and skill levels to get support. Collaborate here on code errors or bugs that you need feedback on, or asking for an extra set of eyes on your latest project. Join thousands of Treehouse students and alumni in the community today. (Note: Only Treehouse students can comment or ask questions, but non-students are welcome to browse our conversations.)

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and a supportive community. Start your free trial today.

PHP Build a Basic PHP Website (2018) Listing and Sorting Inventory Items Array Keys

Josh Bradford
Josh Bradford
9,935 Points

Help with getting and displaying the keys to the $books array

I am having trouble with this particular exercise. How do you get the keys of an array to display alongside their values in this code challenge for the $books array()? I am just not remembering the correct syntax of it I'm sure. Thanks.


$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 $book => $id) { ?>
            <li><?php $isbn = array_keys($id); echo $isbn; echo $book; ?></li>
        <?php } ?>

1 Answer

<?php foreach($books as $isbn => $book) { ?> <li><?php echo $isbn ." ". $book; ?></li> <?php } ?>

Josh Bradford
Josh Bradford
9,935 Points

Thank you, that seemed to work perfectly. I could not for the life of me figure that out.