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

How do i use a foreach loop to save both key and value in separate working variables ?

As the title suggest i am unsure how to solve this challenge i know how to get the key OR the value but not both. Any suggestions ?

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 $key => $isbn) { ?>

            <li><?php echo $key; ?></li>
        <?php } ?>
    </ul>
</body>
</html>

1 Answer

Daniel Stopka
Daniel Stopka
13,520 Points

Hi Frederick,

the syntax for foreach is:

foreach (array_expression as $key => $value)

in your case:

foreach ( $books as $key => $value )

You can name $key and $value variables how you want, best way is to give it a name, that makes sense... In $books array isbn number is a key and a name of the book is value, so you can do it like:

foreach ( $books as $isbn => $book )

Just make sure, that you use correct variable names set there in your statement below...

Hope this helps