From 9415bbca12c01c39da58e0ed2c4e6b44ff833e5d Mon Sep 17 00:00:00 2001
From: donncha <donncha@7be80a69-a1ef-0310-a953-fb0f7c49ff36>
Date: Thu, 30 Nov 2006 18:54:22 +0000
Subject: WP Merge to 4559

git-svn-id: http://svn.automattic.com/wordpress-mu/trunk@816 7be80a69-a1ef-0310-a953-fb0f7c49ff36
---
 wp-includes/query.php | 34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)

(limited to 'wp-includes/query.php')

diff --git a/wp-includes/query.php b/wp-includes/query.php
index 6f5fbf0..337e149 100644
--- a/wp-includes/query.php
+++ b/wp-includes/query.php
@@ -1116,6 +1116,40 @@ class WP_Query {
 	}
 }
 
+
+// Redirect old slugs
+function wp_old_slug_redirect () {
+	global $wp_query;
+	if ( is_404() && '' != $wp_query->query_vars['name'] ) :
+		global $wpdb;
+
+		$query = "SELECT post_id FROM $wpdb->postmeta, $wpdb->posts WHERE ID = post_id AND meta_key = '_wp_old_slug' AND meta_value='" . $wp_query->query_vars['name'] . "'";
+
+		// if year, monthnum, or day have been specified, make our query more precise
+		// just in case there are multiple identical _wp_old_slug values
+		if ( '' != $wp_query->query_vars['year'] )
+			$query .= " AND YEAR(post_date) = '{$wp_query->query_vars['year']}'";
+		if ( '' != $wp_query->query_vars['monthnum'] )
+			$query .= " AND MONTH(post_date) = '{$wp_query->query_vars['monthnum']}'";
+		if ( '' != $wp_query->query_vars['day'] )
+			$query .= " AND DAYOFMONTH(post_date) = '{$wp_query->query_vars['day']}'";
+
+		$id = (int) $wpdb->get_var($query);
+
+		if ( !$id )
+			return;
+
+		$link = get_permalink($id);
+
+		if ( !$link )
+			return;
+
+		wp_redirect($link, '301'); // Permanent redirect
+		exit;
+	endif;
+}
+
+
 //
 // Private helper functions
 //
-- 
cgit