Formatting is wrong and I don't know why.

I coded this code into one of my projects and it ran fine. One thing that you might want to do is avoid echoing out code that you want to display to the browser. It is actually discouraged by the PHP documantation, especially when dealing with large blocks of text. You can read about it here:

http://www.php.net/manual/en/language.basic-syntax.phpmode.php

Just drop down to the Example one section on this page.

It would actually improve the page a bit, and maybe cause less issues with errors if you wrote out your code like this:

<p>PHP: Five Great Books Five Great Books</p> <?php

$books["978-0743261690"] = "Gilgamesh"; $books["978-0060931957"] = "The Odyssey"; $books["978-0192840509"] = "Aesop's Fables"; $books["978-0520227040"] = "Mahabharta"; $books["978-0393320978"] = "Beowulf"; ?> <?php foreach($books as $isbn => $book) { echo "<p> . " . $book . " (" . $isbn . ") </p>"; ?>

This seems less confusion to me, and I only echo out the paragraph tags that will display the book title and ISBN number in the foreach loop. Otherwise I leave it as plan html.

Sorry I couldn't help you, though. This code actually works in a PHP page. If the quizes are giving issues, then that might be something that you might want Treehouse to know about.

This is actually valid php code and works fine as stated above. I recommend you adjust how the code is displayed. I added a break tag to make it more friendly to the eye when displaying. Also if you provide a link to the task we can take a look at it. You might actually missed something crucial for example: the foreach loop has to be at line 12 etc. I recommend you re-read your task description.

<?php

$books["978-0743261690"] = "Gilgamesh"; 
$books["978-0060931957"] = "The Odyssey"; 
$books["978-0192840509"] = "Aesop's Fables";
$books["978-0520227040"] = "Mahabharta"; 
$books["978-0393320978"] = "Beowulf";
?> 
Five Great Books
<?php 
foreach($books as $isbn => $book) { ?> 
<?php echo $book ." (" . $isbn. ") "; ?> <br />
<?php } ?>