Fiddle with object destruction and shutdown. Curses upon php 5.2. fixes #3354

git-svn-id: https://develop.svn.wordpress.org/trunk@4686 602fd350-edb4-49c9-b593-d223f7449a82

wp-includes/cache.php

@@ -8,6 +8,8 @@ function wp_cache_add($key, $data, $flag = '', $expire = 0) {
 function wp_cache_close() {
 	global $wp_object_cache;
 
+	if ( ! isset($wp_object_cache) )
+		return;
 	return $wp_object_cache->save();
 }
 
@@ -392,8 +394,14 @@ class WP_Object_Cache {
 	}
 
 	function WP_Object_Cache() {
+		return $this->__construct();
+	}
+	
+	function __construct() {
 		global $blog_id;
 
+		register_shutdown_function(array(&$this, "__destruct"));
+
 		if (defined('DISABLE_CACHE'))
 			return;
 
@@ -428,5 +436,10 @@ class WP_Object_Cache {
 
 		$this->blog_id = $this->hash($blog_id);
 	}
+
+	function __destruct() {
+		$this->save();
+		return true;	
+	}
 }
 ?>