Remove all WordPress Customers - CLI Tools

tools.php

<?php
if ( php_sapi_name() !== 'cli' || isset( $_SERVER['REMOTE_ADDR'] ) ) {
	die( 'CLI Only' );
}
// Get first arg
if ( ! isset( $argv ) || count( $argv ) < 2 ) {
	echo "Missing parameters.\n";
	echo "script usage: php tools.php [domain]\n";

	die();
}
//Domain
$domain = ( isset( $argv[1] ) ) ? $argv[1] : '';

// Fake WordPress, build server array
$_SERVER = array(
	'HTTP_HOST'       => $domain,
	'SERVER_NAME'     => $domain,
	'REQUEST_URI'     => '',
	'REQUEST_METHOD'  => 'GET',
	'SCRIPT_NAME'     => basename( __FILE__ ),
	'SCRIPT_FILENAME' => basename( __FILE__ ),
	'PHP_SELF'        => basename( __FILE__ ),
);

@ini_set( 'memory_limit', - 1 );
@ini_set( 'display_errors', 1 );

require( dirname( __FILE__ ) . '/wp-load.php' );

@ini_set( 'memory_limit', - 1 );
@ini_set( 'display_errors', 1 );

global $wpdb;

// Remove this line
$users_ids = $wpdb->get_results( "SELECT $wpdb->users.ID as user_id FROM $wpdb->users INNER JOIN $wpdb->usermeta ON ( $wpdb->users.ID = $wpdb->usermeta.user_id ) WHERE 1=1 AND (
  (
    ( $wpdb->usermeta.meta_key = 'wp_capabilities' AND CAST($wpdb->usermeta.meta_value AS CHAR) LIKE '%\"Customer\"%' )
  )
)" );

if ( ! empty( $users_ids ) ) {
	foreach ( $users_ids as $_userid ) {
		$wpdb->query( "DELETE FROM $wpdb->users WHERE ID = $_userid->user_id" );
	}
}

// remove user meta orphaned
$wpdb->query( "DELETE um
FROM $wpdb->usermeta um
LEFT JOIN $wpdb->users us ON us.ID = um.user_id
WHERE us.ID IS NULL" );

die( 'finish' );