Printing more than the first row of array - php

Question

The code below scrapes two values from a webpage and adds them to an array. I've got as far as being able to print the first row of that array but I'm unable to get the whole thing.
I presume some sort of loop will be required but my attempts so far have been unsuccessful.
I feel this should be fairly basic. Any idea what I can do to achieve the desired result?
if(!empty($html)) {
$doc->loadHTML($html);
libxml_clear_errors(); // remove errors for yucky html
$xpath = new DOMXPath($doc);
/* FIND LINK TO PRODUCT PAGE */
$products = array();
$row = $xpath->query("$product_location");
if ($row->length > 0) {
foreach ($row as $location) {
$products['product_url'] = $product_url_root.$location->getAttribute('href');
$products['shop_name'] = $shop_name;
$row = $xpath->query($photo_location);
/* FIND LINK TO IMAGE */
if ($row->length > 0) {
foreach ($row as $location) {
$products['photo_url'] = $photo_url_root.$location->getAttribute('src');
}
}
}
print_r($products);
}
}
EDIT
I should say that I'm hoping to get the array in this format:
Array (
[0] {product_url => 123, shop_name => name, photo_url => abc},
[1] {product_url => 456, shop_name => name, photo_url => def},
[2] {product_url => 789, shop_name => name, photo_url => ghi},
)
The plan is eventually to be able to use the following code in the place of print_r($products) to create an XML file:
$item = $channel->addChild("item");
$item->addChild("product_url", $entry['product_url']);
$item->addChild("shop_name", $entry['shop_name']);
$item->addChild("photo_url", $entry['photo_url']);

Answer 1

You'll need the following details to create the associative array you need:
the product URL
the shop name
the product image URL
Now, in your code, you're looping through the product URLs — and for each product URL, you're looping through the list of product image URLs. This will cause the code inside the nested foreach to be executed n^2 times. You do not want that.
Here's how you should structure your loops:
/* Create an array containing products */
if ($row->length > 0)
{
foreach ($row as $location)
{
$product_urls[] = $product_url_root . $location->getAttribute('href');
}
}
$imgs = $xpath->query($photo_location);
/* Create an array containing the image links */
if ($imgs->length > 0)
{
foreach ($imgs as $img)
{
$photo_url[] = $photo_url_root . $img->getAttribute('src');
}
}
$result = array();
/* Create an associative array containing all the above values */
foreach ($product_urls as $i => $product_url)
{
$result[] = array(
'product_url' => $product_url,
'shop_name' => $shop_name,
'photo_url' => $photo_url[$i]
);
}
print_r($result);