Add multiple custom post type in URL - wordpress

Question

I've made a WordPress website people can rent cars from brokers. So I have 2 custom post types:
broker
car
There are about 10 different cars on the website. All these cars are for each broker exactly the same.
So I've created a page template page-brokers.php that lists all the brokers.
If you click on a broker, you go to the detail page of the broker single-broker.php
The URL is saferental.be/broker/broker-name
On the detail page of the broker, you'll see all the 10 different cars. If you click on a car, you go to the car detail page, which is single-car.php
The URL is saferental.be/car/car-name
At the bottom of the car detail page, is a form to contact the broker you've selected previously. As you see in the URL, there is nothing mentioned of the selected broker.
When you select a broker, its information is saved in a session and pushed into hidden fields in the form.
Everything works perfectly:
- You select a broker
- You pick a car -> go to the car detail page
- Submit the car detail page form which sends the information to the selected broker.
The result I want to have:
- If you select a broker, you go to the detail page saferental.be/broker/broker-name/ (this is already okay)
- If you select a car, you go to the car detail page which should be something like this: saferental.be/broker/broker-name/car/car-name
Test website:
http://safelease.houston-1.hybridmedia.be/
The brokers are at the bottom of the homepage.

Answer 1

Do you want to keep that car detail page also will available under saferental.be/car/car-name?
If not, so — just put car detail page as child page to broker and url for this page will be saferental.be/broker/broker-name/car/car-name
If you want to many different urls for the same page — try to use this plugin https://wordpress.org/plugins/mapping-multiple-urls-redirect-same-page/

Answer 2

I have done something similar to this myself.
This would go in your functions file:
// Setup rewrite rules something like http://yourdomain.com/broker/my-broker/car/my-car
add_action( 'init', 'rewrites_init' );
function rewrites_init() {
add_rewrite_rule(
'broker/([-a-zA-Z0-9]+)/car/([-a-zA-Z0-9]+)$',
'index.php?broker=$matches[1]&car=$matches[2]',
'top' );
}
// Add variables
add_filter('query_vars', 'add_query_vars', 0);
function add_query_vars($vars) {
$vars[] = 'broker';
$vars[] = 'car';
return $vars;
}
// catch the request for this page
add_action('parse_request', 'parse_requests', 0);
function parse_requests() {
global $wp, $wp_query;
if(isset($wp->query_vars['broker']) && isset($wp->query_vars['car'])) {
// find the car post
$posts = new WP_Query( array(
'post_type' => 'car',
'name' => $wp->query_vars['car'],
'post_status' => 'publish'
));
if(!empty($posts) ) {
// set the global query or set your own variable
$wp_query = $posts;
// set the broker variable to use in your template
$broker = get_page_by_path( $wp->query_vars['broker'], OBJECT, 'broker' );
// include your custom post type template
if (include(locate_template('single-car.php', true))) {
exit();
}
} else {
// handle error
$wp_query->set_404();
status_header(404);
locate_template('404.php', true);
exit;
}
}
}
Then in your car template, you should be able to access the $broker post variable.
After you have setup your rewrite rules, you may need to go to Admin -> Settings -> Permalinks and save to set the rewrites.
Hopefully this helps you.