// Styles and Scripts
add_action('admin_head', 'my_custom_styles_and_scripts');
function my_custom_styles_and_scripts() {
    echo '
     <script src="/wp-content/plugins/webfootprint-stock-manager-old/assets/js/scripts.js"></script>
     <link href="/wp-content/plugins/webfootprint-stock-manager-old/assets/css/styles.css" rel="stylesheet">
    ';
}

$woocommerce->cart->empty_cart();

Simple Google Analytics Tracking

INSERT INTO `flowerhhsa_wpbf4c`.`wp_postmeta` (`meta_id`, `post_id`, `meta_key`, `meta_value`) VALUES ('', '', 'xxxdate20180601', 1000);

Just match the fields. eg: (‘meta_id’,`post_id`) values (‘meta_id’,`post_id`)
In this case the meta_id and post_id are left blank as they get auto set in the database

DELETE FROM `flowerhhsa_wpbf4c`.`wp_postmeta` WHERE `meta_key`='xxxdate20180601';