Separate sitemap to multiple files - php

Question

I'm using opencart 2 and default sitemap generator generate everything in one file I mean all products,category,image and so on , its take a long time when you open the file . How can I make something like:
products to be stored in sitemap-product.xml
category to be stored in sitemap-category.xml
image to be stored in sitemap-image.xml
and all to append to sitemap.xml
public function index() {
if ($this->config->get('google_sitemap_status')) {
$output = '<?xml version="1.0" encoding="UTF-8"?>';
$output .= '<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9" xmlns:image="http://www.google.com/schemas/sitemap-image/1.1">';
$this->load->model('catalog/product');
$this->load->model('tool/image');
$products = $this->model_catalog_product->getProducts();
foreach ($products as $product) {
if ($product['image']) {
$output .= '<url>';
$output .= '<loc>' . $this->url->link('product/product', 'product_id=' . $product['product_id']) . '</loc>';
$output .= '<changefreq>weekly</changefreq>';
$output .= '<priority>1.0</priority>';
$output .= '<image:image>';
$output .= '<image:loc>' . $this->model_tool_image->resize($product['image'], $this->config->get('config_image_popup_width'), $this->config->get('config_image_popup_height')) . '</image:loc>';
$output .= '<image:caption>' . $product['name'] . '</image:caption>';
$output .= '<image:title>' . $product['name'] . '</image:title>';
$output .= '</image:image>';
$output .= '</url>';
}
}
$this->load->model('catalog/category');
$output .= $this->getCategories(0);
$this->load->model('catalog/manufacturer');
$manufacturers = $this->model_catalog_manufacturer->getManufacturers();
foreach ($manufacturers as $manufacturer) {
$output .= '<url>';
$output .= '<loc>' . $this->url->link('product/manufacturer/info', 'manufacturer_id=' . $manufacturer['manufacturer_id']) . '</loc>';
$output .= '<changefreq>weekly</changefreq>';
$output .= '<priority>0.7</priority>';
$output .= '</url>';
$products = $this->model_catalog_product->getProducts(array('filter_manufacturer_id' => $manufacturer['manufacturer_id']));
foreach ($products as $product) {
$output .= '<url>';
$output .= '<loc>' . $this->url->link('product/product', 'manufacturer_id=' . $manufacturer['manufacturer_id'] . '&product_id=' . $product['product_id']) . '</loc>';
$output .= '<changefreq>weekly</changefreq>';
$output .= '<priority>1.0</priority>';
$output .= '</url>';
}
}
$this->load->model('catalog/information');
$informations = $this->model_catalog_information->getInformations();
foreach ($informations as $information) {
$output .= '<url>';
$output .= '<loc>' . $this->url->link('information/information', 'information_id=' . $information['information_id']) . '</loc>';
$output .= '<changefreq>weekly</changefreq>';
$output .= '<priority>0.5</priority>';
$output .= '</url>';
}
$output .= '</urlset>';
$this->response->addHeader('Content-Type: application/xml');
$this->response->setOutput($output);
}
}

Answer 1

What you can do is simple. The controller you are trying to extend is the url:
index.php?route=feed/google_sitemap
or
index.php?route=extension/feed/google_sitemap if you are using opencart 2.3.x
The above url loads public function index(), so it's the same as:
index.php?route=feed/google_sitemap/index
Now, copy public function index () and create a new function with name products. It should look like this:
public function products() {
if ($this->config->get('google_sitemap_status')) {
$output = '<?xml version="1.0" encoding="UTF-8"?>';
$output .= '<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9" xmlns:image="http://www.google.com/schemas/sitemap-image/1.1">';
$this->load->model('catalog/product');
$this->load->model('tool/image');
$products = $this->model_catalog_product->getProducts();
foreach ($products as $product) {
if ($product['image']) {
$output .= '<url>';
$output .= '<loc>' . $this->url->link('product/product', 'product_id=' . $product['product_id']) . '</loc>';
$output .= '<changefreq>weekly</changefreq>';
$output .= '<priority>1.0</priority>';
$output .= '<image:image>';
$output .= '<image:loc>' . $this->model_tool_image->resize($product['image'], $this->config->get('config_image_popup_width'), $this->config->get('config_image_popup_height')) . '</image:loc>';
$output .= '<image:caption>' . $product['name'] . '</image:caption>';
$output .= '<image:title>' . $product['name'] . '</image:title>';
$output .= '</image:image>';
$output .= '</url>';
}
}
$output .= '</urlset>';
$this->response->addHeader('Content-Type: application/xml');
$this->response->setOutput($output);
}
}
Now if call the url:
index.php?route=feed/google_sitemap/products
it should load only the products. It won't create the file you want, but it will create the sitemap xml for products on the fly.
Edit / Additional info :
If you have thousands of products you can add some limits easily.
public function products() {
if ($this->config->get('google_sitemap_status')) {
$output = '<?xml version="1.0" encoding="UTF-8"?>';
$output .= '<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9" xmlns:image="http://www.google.com/schemas/sitemap-image/1.1">';
$this->load->model('catalog/product');
$this->load->model('tool/image');
$data = [];
if (isset($this->request->get['start'])) {
$data['start'] = $this->request->get['start'];
} else {
$data['start'] = 0;
}
if (isset($this->request->get['limit'])) {
$data['limit'] = $this->request->get['limit'];
} else {
$data['limit'] = 2000; /* Change the default value for the limit */
}
$products = $this->model_catalog_product->getProducts($data);
foreach ($products as $product) {
if ($product['image']) {
$output .= '<url>';
$output .= '<loc>' . $this->url->link('product/product', 'product_id=' . $product['product_id']) . '</loc>';
$output .= '<changefreq>weekly</changefreq>';
$output .= '<priority>1.0</priority>';
$output .= '<image:image>';
$output .= '<image:loc>' . $this->model_tool_image->resize($product['image'], $this->config->get('config_image_popup_width'), $this->config->get('config_image_popup_height')) . '</image:loc>';
$output .= '<image:caption>' . $product['name'] . '</image:caption>';
$output .= '<image:title>' . $product['name'] . '</image:title>';
$output .= '</image:image>';
$output .= '</url>';
}
}
$output .= '</urlset>';
$this->response->addHeader('Content-Type: application/xml');
$this->response->setOutput($output);
}
}
Let's say that you have 50000 products.
Example of the url to get the first 25000 products:
index.php?route=feed/google_sitemap/products&start=0&limit=25000
Then get the rest 25000 products
index.php?route=feed/google_sitemap/products&start=25000&limit=25000
You can do the same for categories, images, information pages etc.
PS: Of course to load the above urls, you need to add your domain name as prefix :D
Hope this helped you.