Disable pings/trackbacks for local, development, and staging environments

When WP_ENVIRONMENT_TYPE is not `production`, disable pingbacks and trackbacks.  

Otherwise, when `WP_ENVIRONMENT_TYPE` is `local`, `development`, or `staging`, pingbacks and trackbacks are sent when posts are published. This creates confusion on the receiving end and is unnecessary for testing workflows.  

Props arcangelini, cagrimmett, ramonopoly, tyxla, khushipatel15.  

Fixes #64837.


Built from https://develop.svn.wordpress.org/trunk@62417


git-svn-id: http://core.svn.wordpress.org/trunk@61698 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/comment.php

@@ -3163,6 +3163,84 @@ function generic_ping( $post_id = 0 ) {
 	return $post_id;
 }
 
+/**
+ * Determines whether pings should be disabled for the current environment.
+ *
+ * By default, all pings (outgoing pingbacks, trackbacks, and ping service
+ * notifications, as well as incoming pingbacks and trackbacks) are disabled
+ * for non-production environments ('local', 'development', 'staging').
+ *
+ * @since 7.1.0
+ *
+ * @return bool True if pings should be disabled, false otherwise.
+ */
+function wp_should_disable_pings_for_environment() {
+	$environment_type = wp_get_environment_type();
+	$should_disable   = 'production' !== $environment_type;
+
+	/**
+	 * Filters whether pings should be disabled for the current environment.
+	 *
+	 * Returning false re-enables pings in non-production environments.
+	 * Returning true disables pings even in production.
+	 *
+	 * @since 7.1.0
+	 *
+	 * @param bool   $should_disable  Whether pings should be disabled. Default true
+	 *                                for non-production environments, false for production.
+	 * @param string $environment_type The current environment type as returned by
+	 *                                 wp_get_environment_type().
+	 */
+	return apply_filters( 'wp_should_disable_pings_for_environment', $should_disable, $environment_type );
+}
+
+/**
+ * Removes outgoing ping callbacks in non-production environments.
+ *
+ * Hooked to `do_all_pings` at priority 1 so it runs before the default
+ * priority 10 callbacks. Does not remove `do_all_enclosures`.
+ *
+ * @since 7.1.0
+ */
+function wp_maybe_disable_outgoing_pings_for_environment() {
+	if ( wp_should_disable_pings_for_environment() ) {
+		remove_action( 'do_all_pings', 'do_all_pingbacks' );
+		remove_action( 'do_all_pings', 'do_all_trackbacks' );
+		remove_action( 'do_all_pings', 'generic_ping' );
+	}
+}
+
+/**
+ * Rejects incoming trackbacks in non-production environments.
+ *
+ * Hooked to `pre_trackback_post` which fires in `wp-trackback.php` before the
+ * trackback is processed. Calls `trackback_response()` which sends an XML error
+ * response and terminates the request.
+ *
+ * @since 7.1.0
+ */
+function wp_maybe_disable_trackback_for_environment() {
+	if ( wp_should_disable_pings_for_environment() ) {
+		trackback_response( 1, __( 'Trackbacks are disabled in non-production environments.' ) );
+	}
+}
+
+/**
+ * Removes the pingback XML-RPC method in non-production environments.
+ *
+ * @since 7.1.0
+ *
+ * @param string[] $methods An array of XML-RPC methods, keyed by their methodName.
+ * @return string[] Modified array of XML-RPC methods.
+ */
+function wp_maybe_disable_xmlrpc_pingback_for_environment( $methods ) {
+	if ( wp_should_disable_pings_for_environment() ) {
+		unset( $methods['pingback.ping'] );
+	}
+
+	return $methods;
+}
+
 /**
  * Pings back the links found in a post.
  *

wp-includes/default-filters.php

@@ -421,6 +421,12 @@ add_action( 'do_all_pings', 'do_all_pingbacks', 10, 0 );
 add_action( 'do_all_pings', 'do_all_enclosures', 10, 0 );
 add_action( 'do_all_pings', 'do_all_trackbacks', 10, 0 );
 add_action( 'do_all_pings', 'generic_ping', 10, 0 );
+
+// Disable pings (pingbacks, trackbacks, and ping service notifications) in non-production environments.
+add_action( 'do_all_pings', 'wp_maybe_disable_outgoing_pings_for_environment', 1, 0 );
+add_action( 'pre_trackback_post', 'wp_maybe_disable_trackback_for_environment', 10, 0 );
+add_filter( 'xmlrpc_methods', 'wp_maybe_disable_xmlrpc_pingback_for_environment' );
+
 add_action( 'do_robots', 'do_robots' );
 add_action( 'do_favicon', 'do_favicon' );
 add_action( 'wp_before_include_template', 'wp_start_template_enhancement_output_buffer', 1000 ); // Late priority to let `wp_template_enhancement_output_buffer` filters and `wp_finalized_template_enhancement_output_buffer` actions be registered.

wp-includes/version.php

@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '7.1-alpha-62416';
+$wp_version = '7.1-alpha-62417';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.