Function in PHP not working - php

Question

I have this php code which takes in elements from an array and arranges the values into divs (the code starts a new row after every 3 items):
<?php
function display_products($product_id, $product){
$count = 0;
$output = "";
foreach($products as $product_id => $product) {
if (++$count % 3 == 1){
$output = $output . '<div class="offset1 span3">';
}
else {
$output = $output . '<div class="span3">';
}
$output = $output . '<div class="centre">';
$output = $output . '<img src="' . $product["img"] . '" alt="' . $product["name"] . '">';
$output = $output . "</div>";
$output = $output . "</div>";
if (++$count % 3 == 0) {
$output = $output . "</div> <div class='row-fluid'>";
}
}
return $output;
}
$products = array();
$products[101] = array(
"name" => "My Product",
"img" => "img/product1.jpg"
);
?>
and have linked to this file in my index.php file like this:
<div class="row-fluid">
<?php
echo display_products($product_id, $product);
?>
</div>
my problem is, the function doesn't work. The code worked fine before I pasted it into the function.

Answer 1

You're defining the second variable passed into your function to be named $product, then using $products to loop through (which won't exist).
Should be:
function display_products($product_id, $products){
...
foreach($products as $product_id => $product) {