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PHP Build a Simple PHP Application Listing Inventory Items More Excitement With Arrays

Posted by Ben Whitehead
Ben Whitehead
5,033 Points

Undefined index??? (Listing Inventory Items code challenge)

Hello - I'm stumped on this code challenge. My foreach loop isn't working for some reason - I get an "Undefined index" error. The first line of the error is below:

Notice: Undefined index: Chocolate in C:\xampp\htdocs\flavors.php on line 25

I wrote a while loop above before the foreach loop to test it out and it worked fine. The code for the code challenge is below, starting with the array declaration:

<?php
$flavors = array();
$flavors[] = "Chocolate";
$flavors[] = "Vanilla";
$flavors[] = "Deliciousness";

$flavor = 0;

while($flavor < 3) {
    echo $flavors[$flavor] . "<br>"; 
    $flavor++;
}
?>

<html> <body>

<p>Welcome to Ye Olde Ice Cream Shoppe. We sell <?php echo count($flavors); ?> flavors of ice cream.</p>
<ul>
  <?php foreach($flavors as $flavor) { ?>

    <li><?php echo $flavors[$flavor] . "\n"; ?></li>

  <?php } ?>
</ul>

</body> </html>

I don't know where I went wrong! Can someone show me the light?

Thanks!!

1 Answer

Nick Beatty
Nick Beatty
9,257 Points
Nick Beatty
Nick Beatty
9,257 Points

I think it should just be:

<?php echo $flavor . "\n"; ?>

You're currently trying to use "chocolate" as an array index. :)

Ben Whitehead
Ben Whitehead
5,033 Points

That fixed it! Looks like I was confused on the difference between a foreach loop and the other loops. So in a foreach, you never have to make use of the index? In other words, the actual loop does that for you? Whereas you do have to use the index in the other loops?

Thanks!!!