Build dynamic page from cURL (HTML page) response with plugin

To make this work with WordPress use the AJAX API. While that technically refers to Javascript it will handle any request if the appropriate values are sent.

You would create a callback like this one form the Codex:

add_action('wp_ajax_my_action', 'my_action_callback');

function my_action_callback() {
    global $wpdb; // this is how you get access to the database

    $whatever = intval( $_POST['whatever'] );

    $whatever += 10;

        echo $whatever;

    die(); // this is required to return a proper result
}

Then send a POST request with the my_action argument set. Notice how that is hook name wp_ajax_my_action minus wp_ajax_. You will need to use wp_ajax_nopriv_my_action for users that are not logged– presumably your cURL script isn’t logged in.

To display the cURL content…

1. Create a page template to display your cURL. It should look
   something like:

   /* Template Name: cURL Content */
   // code for your curl data
   // no other code at all
   

2. Go to the backend to wp-admin->Pages and create a page. Select the
   template you created as the “Template”

Done. That page should display only your cURL data. It will have no internal WordPress functionality, though, as far as script or style loading, and a number of other things, because you are not including wp_head and wp_footer.