Wordpress Plug-ins: How-to add custom URL Handles

Question

I\'m trying to write a Wordpress Plug-in but can\'t seem to figure out how you would modify how a URL gets handled, so for example: any requests made for:

Answer 1

add_action('parse_request', 'my_custom_url_handler');
function my_custom_url_handler() {
  if( isset($_GET['myplugin']) ) {
    // do something
    exit();
  }
}

That should set you on the right direction. parse_request happens before WordPress runs any of the complicated WordPress queries used to get the posts for the current URL.