edit-site-routes-backwards-compat.php in Gutenberg 23.2.0, at lib/compat/plugin/edit-site-routes-backwards-compat.php

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1	<?php
2	/**
3	* Backwards compatibility handling for routes used by the plugin consumers.
4	* This doesn't need to be back ported to core and will be removed after WP 6.1,
5	* to ensure that the plugin consumers have enough time to migrate to the core's
6	* route (`site-editor.php`).
7	*
8	* Allows the `theme.php` route and redirects the following routes:
9	* - `themes.php?page=gutenberg-edit-site`
10	* - `admin.php?page=gutenberg-edit-site`
11	*
12	* To `site-editor.php`.
13	*
14	* The old routes have been deprecated and removed in Gutenberg 13.7.0, but third-party
15	* consumer code might still be referencing them. In order to not break the Site Editor
16	* flows, we don't fully remove the old routes, but redirect them to the core's one.
17	*
18	* @see https://github.com/WordPress/gutenberg/pull/41306
19	*
20	* @package gutenberg
21	*/
22
23	/**
24	* Allows the old routes. Without this, trying to access the old Site Editor
25	* routes results in a HTTP 403 error.
26	*
27	* Allowing the route is done by adding an wp-admin submenu page that won't be rendered.
28	*/
29	function gutenberg_site_editor_menu() {
30	if ( wp_is_block_theme() ) {
31	add_submenu_page( '', '', '', 'edit_theme_options', 'gutenberg-edit-site', '__return_empty_string' );
32	}
33	}
34	add_action( 'admin_menu', 'gutenberg_site_editor_menu', 9 );
35
36	/**
37	* Does the actual redirect to the new route upon triggering of the `load-appearance_page_gutenberg-edit-site` action.
38	*/
39	function gutenberg_redirect_deprecated_to_new_site_editor_page() {
40	wp_safe_redirect( 'site-editor.php' );
41	exit;
42	}
43	add_action( 'load-appearance_page_gutenberg-edit-site', 'gutenberg_redirect_deprecated_to_new_site_editor_page' );
44	add_action( 'load-admin_page_gutenberg-edit-site', 'gutenberg_redirect_deprecated_to_new_site_editor_page' );
45