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

What's wrong with this code?

The question was " 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)"

and the error message was as follows:

Notice: Array to string conversion in index.php on line 19 Array(978-0743261690) Notice: Array to string conversion in index.php on line 19 Array(978-0060931957) Notice: Array to string conversion in index.php on line 19 Array(978-0192840509) Notice: Array to string conversion in index.php on line 19 Array(978-0520227040) Notice: Array to string conversion in index.php on line 19 Array(978-0393320978)

! The ISBN numbers should appear in parenthesis following the corresponding title.

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) { ?>
            <li><?php echo $book; ?></li>
        <?php } ?>
    </ul>
</body>
</html>

1 Answer

You didn't show your code, so I can't tell you what's wrong, but here's what it's supposed to look like:

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

In Task 1 you store the isbns in a variable: foreach($books as $isbn => $book)

In Task 2 you echo both book and isbn, but the latter inside parentheses: echo $book . "(" . $isbn . ")";

Thank you so much. I really appreciate it. :)