Cancel all of your subs

cancel-all-subs.php

<?php
/**
 * Plugin Name: Cancel all subscriptions.
 * Description: Cancel all subscriptions.
 * Version: 1.0
 */
// Prevent direct access to this file
if ( ! defined( 'ABSPATH' ) ) {
	die( "You can't do anything by accessing this file directly." );
}
add_action( 'init', 'cancel_all_subscriptions', 20 );
function cancel_all_subscriptions() {
	$subscriptions = wcs_get_subscriptions( array(
		'subscriptions_per_page' => -1,
	) );
	foreach ( $subscriptions as $subscription ) {
		if ( $subscription->can_be_updated_to( 'cancelled' ) ) {
			$subscription->update_status( 'cancelled', 'Subscription cancelled via bulk cancellation.' );
		}
	}
	unset( $subscriptions );
}