Create dynamic page content from custom Wordpress plugin page

Question

I would like to create a custom Wordpress page from a plugin displaying content that is not from Wordpress with 2 get parameters and apply rewriting rules on it.

Let's say I have a file called test.php. I would like with 2 get parameters to display content using the URL:

example.com/param1/param2/

I'm good on the plugin side (Admin, etc...) but have no clue about custom page. At the moment I have this code in my test.php file but I'm really not sure if that's the right way to do:

include('../../../wp-load.php');
include('myplugin.php');

global $myclass, $wpdb;

echo $myclass->get_setting('test');

Or would I need to check query vars parameters passed in URL and modify content accordingly?

I tried some stackoverflow answers without success so if you could hint me up on this. Thanks a lot in advance.

Answer 1

1. Create a page for this purpose, which you can filter its content later UNLESS you are working other way.

2. Add the page ID to the rewrite rule init function:

   add_action('init', function() {
   
       $page = get_post( 2 ); // replace 2 with page ID
   
       add_rewrite_rule(
           '([^/]+)/([^/]+)/?$',
           'index.php?pagename=' . $page->post_name . '&my_param_1=$matches[1]&my_param_2=$matches[2]',
           'top'
       );
   
   });
   

3. Append the query variables to the main query:

   add_filter('query_vars', function($vars) {
       $vars[] = "my_param_1";
       $vars[] = "my_param_2";
       return $vars;
   });
   

You should be done now and you need to flush the rewrite rules with either flush_rewrite_rules() hooked to init or wp, or go to Settings > Permalinks and hit the save button in the bottom.

Now a test > http://example.com/john/smith/ :

// first param
echo var_dump( get_query_var( 'my_param_1' ) ); // john

// second param
echo var_dump( get_query_var( 'my_param_2' ) ); // smith

I hope that works for you as it did in my local installation.

Edit: It would be much better if you make the parameters go after the page name like $page->post_name . '/([^/]+)/([^/]+)/?$' so you get /sample-page/john/smith/ This way you won't make any conflicts to existing contents and WordPress will serve the existing content initially before passing to your plugin OR add a unique prefix before the first param slug. Just a thought so.