In multisite, on the `updated_option` action, if the option name is one of: 'blogname', 'siteurl', 'post_count' - refresh the blog details cache for the current blog id.

Adds unit test.

Props kovshenin.
Fixes #26410.

Built from https://develop.svn.wordpress.org/trunk@28881


git-svn-id: http://core.svn.wordpress.org/trunk@28680 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/ms-blogs.php

@@ -263,6 +263,19 @@ function refresh_blog_details( $blog_id ) {
 	do_action( 'refresh_blog_details', $blog_id );
 }
 
+/**
+ * Refresh blog details when an option is updated.
+ *
+ * @access private
+ * @param string $option_name
+ */
+function _wp_refresh_blog_details_on_updated_option( $option_name ) {
+	$options = array( 'blogname', 'siteurl', 'post_count' );
+	if ( in_array( $option_name, $options ) ) {
+		refresh_blog_details( get_current_blog_id() );
+	}
+}
+
 /**
  * Update the details for a blog. Updates the blogs table for a given blog id.
  *

wp-includes/ms-default-filters.php

@@ -70,6 +70,9 @@ add_filter( 'force_filtered_html_on_import', '__return_true' );
 remove_filter( 'option_siteurl', '_config_wp_siteurl' );
 remove_filter( 'option_home',    '_config_wp_home'    );
 
+// Some options changes should trigger blog details refresh.
+add_action( 'updated_option', '_wp_refresh_blog_details_on_updated_option' );
+
 // If the network upgrade hasn't run yet, assume ms-files.php rewriting is used.
 add_filter( 'default_site_option_ms_files_rewriting', '__return_true' );