From 837b6c3e3e97c60d2d0d6f117075594fe9015b02 Mon Sep 17 00:00:00 2001
From: Jeremy Felt <jeremyfelt@git.wordpress.org>
Date: Thu, 10 Sep 2015 05:05:14 +0000
Subject: [PATCH] Multisite: Add action to handle network not found

`ms_network_not_found` fires when the global `$current_site` has not been filled and `ms_not_installed()` is about to fire. It cannot be used to populate `$current_site`, but can be used to capture the request and redirect or present a custom error.

Props rmccue.
Fixes #31702.


git-svn-id: https://develop.svn.wordpress.org/trunk@33990 602fd350-edb4-49c9-b593-d223f7449a82
---
 src/wp-includes/ms-settings.php | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/src/wp-includes/ms-settings.php b/src/wp-includes/ms-settings.php
index d7f42b367d..88e7629887 100644
--- a/src/wp-includes/ms-settings.php
+++ b/src/wp-includes/ms-settings.php
@@ -86,6 +86,19 @@ if ( !isset( $current_site ) || !isset( $current_blog ) ) {
 		}
 
 		if ( empty( $current_site ) ) {
+			/**
+			 * Fires when a network cannot be found based on the requested domain and path.
+			 *
+			 * At the time of this action, the only recourse is to redirect somewhere
+			 * and exit. If you want to declare a particular network, do so earlier.
+			 *
+			 * @since 4.4.0
+			 *
+			 * @param string $domain       The domain used to search for a network.
+			 * @param string $path         The path used to search for a path.
+			 */
+			do_action( 'ms_network_not_found', $domain, $path );
+
 			ms_not_installed( $domain, $path );
 		} elseif ( $path === $current_site->path ) {
 			$current_blog = get_site_by_path( $domain, $path );
@@ -111,6 +124,9 @@ if ( !isset( $current_site ) || !isset( $current_blog ) ) {
 
 	// No network has been found, bail.
 	if ( empty( $current_site ) ) {
+		/** This action is documented in wp-includes/ms-settings.php */
+		do_action( 'ms_network_not_found', $domain, $path );
+
 		ms_not_installed( $domain, $path );
 	}