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

I can't get it worked!

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

index.php
<?php

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

?><html>
<head>
    <title>Five Great Books</title>
</head>
<body>
    <h1>Five Great Books</h1>
    <ul>
        <?php foreach($books as $book => $isbn) { ?>
            <li><?php echo $book . " " . $isbn ; ?></li>
        <?php } ?>
    </ul>
</body>
</html>

2 Answers

foreach loop works like this.

<?php
$array[$key] = $value;
foreach ($array as $key => $value) {

}
?>

In this code challenge, $key is the isbn and $value is the book title.

<?php foreach($books as $isbn => $book) { ?>

Hope this helps:)

Thank you very much sara! I reversed $book and $isbn and everything worked fine!