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

Christopher Simmons
Christopher Simmons
5,296 Points

Outputting array keys

I'm lost on Challenge Task 2 of 2 Array Keys

Challenge Task 2 of 2

Next, modify the code inside the foreach loop to display both the $title and the $isbn. After the title, add a space, an opening parenthesis, the ISBN, and a closing parenthesis, like this: Gilgamesh (978-0743261690)

I didn't see this in any of the training videos unless I missed it. At this point I'm just stuck.

Need help moving further.

Here is the confusion I came up with:

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

Totally lost right now.


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

1 Answer

Paul Yabsley
Paul Yabsley
46,713 Points

You were close. You need to include the book title as part of the string that you're echoing. As well as the isbn. You also seem to have gotten a bit mixed up with your concatenation syntax. You need to form your string like this: $book . "(" . $isbn . ")";

I think the below should pass the question.

    foreach ($books as $isbn => $book) {
    <li><?php echo $book . "(" . $isbn . ")" ;  ?></li>
Paul Yabsley
Paul Yabsley
46,713 Points

Remember you only need the concatenation operator (the period) when you are joining one thing to another.