Easy Forms for MailChimp - Alter URL user is redirected too using the yikes-mailchimp-redirect-url filter

yikes-mailchimp-redirect-url-example.php

<?php
/*
* Alter the URL the user is redirected to after a successfull submission of form #3
* - Add a custom URL, or add query args to the page URL selected on the edit forms page
* @parameters 
* $url - the original URL set on the edit forms page
* $form_id - the ID of the form that was submitted
* $page_data - the global $post data - contains all sorts of info about the current page (including ID, title etc.)
*/
function yikes_mailchimp_alter_redirect_url( $url, $form_id, $page_data ) {
	// confirm this is form #3
	if( $form_id == '3' ) {
		// setup our switch statement
		switch( $page_data->ID ) {
			default:
				return $url; // return defualt URL selected on edit form page
				break;
				
			case '3822': // targets forms submitted on page with ID 3822
				$url = esc_url( 'https://www.google.com/search?q=search+1&oq=custom_page' ); // redirect to a google search of term "custom_page"
				break;
				
			case '3824': // targets page with ID #3824
			 // add custom query arguments (param_1="parameter-1" etc) to the redirect page
				$url = add_query_arg(
				  array(
				    'param_1' => 'parameter-1',
				    'param_2' => 'parameter-2'
				  ),
				  $url
				);
				break;
		}
	}
	// return the altered URL
	return $url;
}
add_filter( 'yikes-mailchimp-redirect-url', 'yikes_mailchimp_alter_redirect_url', 10, 3 );
?>