Delete All Subscribers in WordPress Site

functions.php

function delete_all_subscribers() {
	require_once(dirname( ABSPATH ) . '/public_html/wp-admin/includes/user.php');
	
	$args = array(
    'role'    => 'subscriber',
	);
	$users = get_users( $args );
	foreach ( $users as $user ) {
		wp_delete_user($user->id);
	}
}

delete_all_subscribers();