PHP TemplateData::delete_letters_feed示例

    private static function list_letters()
    {
        if (!self::is_gravityforms_supported()) {
            die(__(sprintf("PayPal Add-On requires Gravity Forms %s. Upgrade automatically on the %sPlugin page%s.", self::$min_gravityforms_version, "<a href='plugins.php'>", "</a>"), "gravityformspaypal"));
        }
        if (rgpost('action') == "delete") {
            check_admin_referer("list_action", "letters_list");
            $id = absint($_POST["action_argument"]);
            TemplateData::delete_letters_feed($id);
            ?>
            <div class="updated fade" style="padding:6px"><?php 
            _e("Feed deleted.", "templatemerge");
            ?>
</div>
            <?php 
        } else {
            if (!empty($_POST["bulk_action"])) {
                check_admin_referer("list_action", "letters_list");
                $selected_feeds = $_POST["feed"];
                if (is_array($selected_feeds)) {
                    foreach ($selected_feeds as $feed_id) {
                        TemplateData::delete_letters_feed($feed_id);
                    }
                }
                ?>
            <div class="updated fade" style="padding:6px"><?php 
                _e("Feeds deleted.", "templatemerge");
                ?>
</div>
            <?php 
            }
        }
        require_once self::get_base_path() . DIRECTORY_SEPARATOR . "list_letters_page.php";
    }