Ticket #50493: register_rest_route_4.patch.txt

diff --git a/src/wp-includes/rest-api.php b/src/wp-includes/rest-api.php
index 7aa2534520..1c0a46fd2d 100644
--- a/src/wp-includes/rest-api.php
+++ b/src/wp-includes/rest-api.php
@@ -38,26 +38,55 @@ function register_rest_route( $route_namespace, $route, $args = array(), $overri
                 * and namespace indexes. If you really need to register a
                 * non-namespaced route, call `WP_REST_Server::register_route` directly.
                 */
-               _doing_it_wrong( 'register_rest_route', __( 'Routes must be namespaced with plugin or theme name and version.' ), '4.4.0' );
+               _doing_it_wrong(
+                       __FUNCTION__,
+                       sprintf(
+                               /* translators: 1: string value of the namespace, 2: string value of the route. */
+                               __( 'Routes must be namespaced with plugin or theme name and version. Instead there seems to be an empty namespace \'%1$s\' for route \'%2$s\'.' ),
+                               '<code>' . $route_namespace . '</code>',
+                               '<code>' . $route . '</code>'
+                       ),
+                       '4.4.0'
+               );
                return false;
        } elseif ( empty( $route ) ) {
-               _doing_it_wrong( 'register_rest_route', __( 'Route must be specified.' ), '4.4.0' );
+               _doing_it_wrong(
+                       __FUNCTION__,
+                       sprintf(
+                               /* translators: 1: string value of the namespace, 2: string value of the route. */
+                               __( 'Route must be specified. Instead within the namespace \'%1$s\', there seems to be an empty route \'%2$s\'.' ),
+                               '<code>' . $route_namespace . '</code>',
+                               '<code>' . $route . '</code>'
+                       ),
+                       '4.4.0'
+               );
                return false;
        }
 
        $clean_namespace = trim( $route_namespace, '/' );
 
        if ( $clean_namespace !== $route_namespace ) {
-               _doing_it_wrong( __FUNCTION__, __( 'Namespace must not start or end with a slash.' ), '5.4.2' );
+               _doing_it_wrong(
+                       __FUNCTION__,
+                       sprintf(
+                               /* translators: 1: string value of the namespace, 2: string value of the route. */
+                               __( 'Namespace must not start or end with a slash. Instead namespace \'%1$s\' for route \'%2$s\' seems to contain a slash.' ),
+                               '<code>' . $route_namespace . '</code>',
+                               '<code>' . $route . '</code>'
+                       ),
+                       '5.4.2'
+               );
        }
 
        if ( ! did_action( 'rest_api_init' ) ) {
                _doing_it_wrong(
-                       'register_rest_route',
+                       __FUNCTION__,
                        sprintf(
-                               /* translators: %s: rest_api_init */
-                               __( 'REST API routes must be registered on the %s action.' ),
-                               '<code>rest_api_init</code>'
+                               /* translators: 1: rest_api_init, 2: string value of the namespace, 3: string value of the route. */
+                               __( 'REST API routes must be registered on the %1$s action. Instead route \'%3$s\' with namespace \'%2$s\' was not registered on this action.' ),
+                               '<code>rest_api_init</code>',
+                               '<code>' . $route_namespace . '</code>',
+                               '<code>' . $route . '</code>'
                        ),
                        '5.1.0'
                );