Wordpress dismissible admin notice example

_admin_notice_example.php

<?php

if (!defined('ABSPATH')) {
    die('-1');
}


if (!class_exists('ANT_NOTICE')) {

    class ANT_NOTICE
    {

        protected static $instance;

        function add_notices()
        {
            if (!get_user_meta(get_current_user_id(), 'ant_ajax-update-notice', true)) {
                ?>
                <div id="ant_ajax-admin-rating" class="ant_ajax-notice notice is-dismissible" data-notice_id="ant_ajax-update-notice">
                    <div class="notice-container" style="padding-top: 10px; padding-bottom: 10px; display: flex; justify-content: left; align-items: center;">
                        <!-- <div class="notice-image">
                            <img style="border-radius:50%;max-width: 90px;" src="<?php echo plugins_url('/assets/blah.png', ANT_PLUGIN_FILE); ?>" alt="">
                        </div> -->
                        <div class="notice-content" style="margin-left: 15px;">
                            <h2>I AM NOTICE!</h2>
                            <?php if (current_user_can('activate_plugins')) : ?>
                            <p>Activate plugin todo or other stuff</p>
                            <?php endif; ?>
                        </div>
                    </div>
                </div>
                <script>
                    (function($) {
                        $('.ant_ajax-notice').on('click', '.notice-dismiss', function(e) {
                            e.preventDefault();
                            var notice_id = $(e.delegateTarget).data('notice_id');
                            $.ajax({
                                type: 'POST',
                                url: ajaxurl,
                                data: {
                                    notice_id: notice_id,
                                    action: 'ant_ajax_dismiss_notice',
                                },
                                success: function(response) {
                                    console.log(response);
                                },
                            });
                        });
                    })(jQuery);
                </script>
                <?php
            }
        }

        function ajax_dismiss_notice()
        {

            if ($notice_id = (isset($_POST['notice_id'])) ? sanitize_key($_POST['notice_id']) : '') {
                update_user_meta(get_current_user_id(), $notice_id, true);
                wp_send_json($notice_id);
            }

            wp_die();
        }

        function init()
        {
            add_action('wp_ajax_ant_ajax_dismiss_notice', array($this, 'ajax_dismiss_notice'));
            add_action('admin_notices', array($this, 'add_notices'));
        }

        public static function instance()
        {
            if (!isset(self::$instance)) {
                self::$instance = new self();
                self::$instance->init();
            }
            return self::$instance;
        }
    }

    ANT_NOTICE::instance();
}