From a60b801d5d3467dd9ec222c25fa3f85ce9601cd9 Mon Sep 17 00:00:00 2001
From: nacin <nacin@1a063a9b-81f0-0310-95a4-ce76da25c4cd>
Date: Thu, 18 Feb 2010 23:41:50 +0000
Subject: [PATCH] Bail early for favicon.ico requests so we don't load WP
 twice. Props azaozz, sivel. Fixes #3426

git-svn-id: http://svn.automattic.com/wordpress/trunk@13205 1a063a9b-81f0-0310-95a4-ce76da25c4cd
---
 wp-includes/load.php | 14 ++++++++++++++
 wp-settings.php      |  3 +++
 2 files changed, 17 insertions(+)

diff --git a/wp-includes/load.php b/wp-includes/load.php
index e18fd2345..fe707411f 100644
--- a/wp-includes/load.php
+++ b/wp-includes/load.php
@@ -104,6 +104,20 @@ function wp_check_php_mysql_versions() {
 		die( /*WP_I18N_OLD_MYSQL*/'Your PHP installation appears to be missing the MySQL extension which is required by WordPress.'/*/WP_I18N_OLD_MYSQL*/ );
 }
 
+/**
+ * Don't load all of WordPress when handling a favicon.ico request.
+ * Instead, send the headers for a zero-length favicon and bail.
+ *
+ * @since 3.0.0
+ */
+function wp_favicon_request() {
+        if ( '/favicon.ico' == $_SERVER['REQUEST_URI'] ) {
+                header('Content-Type: image/vnd.microsoft.icon');
+                header('Content-Length: 0');
+                exit;
+        }
+}
+
 /**
  * Dies with a maintenance message when conditions are met.
  *
diff --git a/wp-settings.php b/wp-settings.php
index 3ac778abe..71b999eb5 100644
--- a/wp-settings.php
+++ b/wp-settings.php
@@ -43,6 +43,9 @@ wp_fix_server_vars();
 // Check for the required PHP version and for the MySQL extension or a database drop-in.
 wp_check_php_mysql_versions();
 
+// Check if we have recieved a request due to missing favicon.ico 
+wp_favicon_request();
+
 // Check if we're in maintenance mode.
 wp_maintenance();