Delete Users from a WordPress Website once they Unsubscribed from a List

If you need a more deep synchronization between WordPress and MailChimp, take a look at my plugin.

Create a Webhook inside MailChimp

Actually there are two ways of creating MailChimp webhooks – via the dashboard and via the MailChimp API. In this tutorial we will talk about the first method, but if you need a way to create webhooks in code, check this tutorial.

To create a webhook, in your MailChimp dashboard go to Lists, select one and in a dropdown menu Settings select Webhooks.

Webhook settings page will look something like this:

Configure unsubscribe event for a MailChimp webhook

Delete a user once the webhook is fired

Once you created a webhook, let’s configure your WordPress website the proper way. Actually, you do not even have to have much coding knowledge, just insert the below code to your current theme functions.php (better a child theme or a custom plugin).

add_action( 'init', 'misha_user_delete_webhook');
function misha_user_delete_webhook(){

	// exit the function in case it is not our hook
	if( empty( $_GET['process-webhook'] ) || empty( $_POST['type'] ) || $_GET['process-webhook'] != 'delete' )

	if( $_POST['type'] === 'unsubscribe' ) {

		// we must get user ID somehow, let's to it with get_user_by()
		$user = get_user_by( 'email', $_POST['data']['email'] );

		// wp_delete_user() is an Admin function and it won't work without this line
		require_once(ABSPATH . 'wp-admin/includes/user.php' );
		wp_delete_user( $user->ID );

If users have some articles on your website and you do not want to delete all the content, to a second parameter pass a user ID, you would like to reassign the content to, example: wp_delete_user( $user->ID, 1 ).

Misha Rudrastyh

Misha Rudrastyh

Hey guys and welcome to my website. For more than 10 years I've been doing my best to share with you some superb WordPress guides and tips for free.

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