REST API: Include permalink_structure in the settings route.

There are situations where the REST API client wants to be able to read and set the permalink_structure option. Though this doesn’t fix the use case of front-end rendered unauthenticated websites, it still has utility as a setting in it’s own right.

Props aduth.
See #41014.


git-svn-id: https://develop.svn.wordpress.org/trunk@42359 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/option.php

@@ -2020,6 +2020,11 @@ function register_initial_settings() {
 		)
 	);
 
+	register_setting( 'permalink', 'permalink_structure', array(
+		'show_in_rest' => true,
+		'type'         => 'string',
+		'description'  => __( 'Custom URL structure for permalinks and archives.' ),
+	) );
 }
 
 /**

tests/phpunit/tests/rest-api/rest-settings-controller.php

@@ -72,6 +72,7 @@ class WP_Test_REST_Settings_Controller extends WP_Test_REST_Controller_Testcase
 			'posts_per_page',
 			'default_ping_status',
 			'default_comment_status',
+			'permalink_structure',
 		);
 
 		if ( ! is_multisite() ) {