# master-addons/3.1.2/inc/admin/theme-builder/theme-builder.php

Master Addons for Elementor – Elementor Addons, Widgets, Mega Menu Builder, Popup Builder, Widget Builder & Template Kits, version 3.1.2. 75 lines.

- Page: https://pluginprobe.com/plugins/master-addons/3.1.2/code/inc/admin/theme-builder/theme-builder.php
- Raw: https://pluginprobe.com/plugins/master-addons/3.1.2/raw/inc/admin/theme-builder/theme-builder.php
- Modified: 2026-05-19T13:15:32+00:00

Line numbers below start at 1. Link to a line or a range by appending a fragment to the
page URL, for example `https://pluginprobe.com/plugins/master-addons/3.1.2/code/inc/admin/theme-builder/theme-builder.php#L10-L20`.

```php
<?php

namespace MasterAddons\Inc\Admin\Theme_Builder;

defined('ABSPATH') || exit;

// The free and pro plugins are built from a shared source and can both
// ship this file. Guard the declaration to avoid a fatal "Cannot declare
// class ... already in use" error when both plugins are active.
if (!class_exists(__NAMESPACE__ . '\\Loader')) {

    class Loader
    {
        private static $_instance = null;

        public function __construct()
        {
            // Load the main Theme_Builder class via autoloader
            Theme_Builder::get_instance();

            // Handle admin redirects
            add_action('admin_init', [$this, 'handle_admin_redirects']);
        }

        /**
         * Handle redirects for master_template post type
         */
        public function handle_admin_redirects()
        {
            // phpcs:disable WordPress.Security.NonceVerification.Recommended -- Read-only checks of WordPress-set admin query vars for redirect flow; no form data is processed.
            global $pagenow;
            $target_post_type = 'master_template';
            $redirect_url = admin_url('edit.php?post_type=master_template');

            if ('post.php' === $pagenow && isset($_GET['post'])) {
                if (isset($_GET['action']) && in_array($_GET['action'], ['elementor', 'trash', 'delete', 'restore', 'untrash'], true)) {
                    return;
                }

                $post_id = absint($_GET['post']);
                if ($post_id) {
                    $current_post_type = get_post_type($post_id);

                    if ($target_post_type === $current_post_type) {
                        $master_template_type = get_post_meta($post_id, 'master_template_type', true);
                        if (!empty($master_template_type)) {
                            $redirect_url .= '&master_template_type_filter=' . $master_template_type;
                        }
                        wp_safe_redirect($redirect_url);
                        exit;
                    }
                }
            }

            if ('post-new.php' === $pagenow && isset($_GET['post_type'])) {
                $current_post_type = sanitize_key($_GET['post_type']);

                if ($target_post_type === $current_post_type) {
                    wp_safe_redirect($redirect_url);
                    exit;
                }
            }
            // phpcs:enable WordPress.Security.NonceVerification.Recommended
        }

        public static function get_instance()
        {
            if (is_null(self::$_instance)) {
                self::$_instance = new self();
            }
            return self::$_instance;
        }
    }
}

```