From dfbe420d9c903c9003d23fa4cfd4d34d1ba3649c Mon Sep 17 00:00:00 2001
From: scribu <scribu@git.wordpress.org>
Date: Mon, 18 Oct 2010 21:54:39 +0000
Subject: [PATCH] Get rid of wp_cache_key(), as it's not really that useful.
 See [15838]

git-svn-id: https://develop.svn.wordpress.org/trunk@15839 602fd350-edb4-49c9-b593-d223f7449a82
---
 wp-includes/functions.php | 20 +-------------------
 wp-includes/post.php      |  4 ++--
 2 files changed, 3 insertions(+), 21 deletions(-)

diff --git a/wp-includes/functions.php b/wp-includes/functions.php
index f08022fdb6..61c53202a8 100644
--- a/wp-includes/functions.php
+++ b/wp-includes/functions.php
@@ -279,24 +279,6 @@ function is_serialized_string( $data ) {
 	return false;
 }
 
-/**
- * Generates a unique key from an argument
- * 
- * @since 3.1
- *
- * @param mixed $arg
- * @return string
- */
-function wp_cache_key( $arg ) {
-	if ( is_scalar( $arg ) )
-		return md5( $arg );
-
-	$arg = (array) $arg;
-	sort( $arg );
-
-	return md5( serialize( $arg ) );
-}
-
 /**
  * Retrieve option value based on name of option.
  *
@@ -4436,4 +4418,4 @@ function wp_find_hierarchy_loop_tortoise_hare( $callback, $start, $override = ar
  */
 function no_admin_bar() {
 	define('WP_SHOW_ADMIN_BAR', false);
-}
\ No newline at end of file
+}
diff --git a/wp-includes/post.php b/wp-includes/post.php
index 4a4c61668f..061ad7e382 100644
--- a/wp-includes/post.php
+++ b/wp-includes/post.php
@@ -3989,7 +3989,7 @@ function _get_last_post_time( $timezone, $field ) {
 
 	$post_types = apply_filters( "get_lastpost{$field}_post_types", (array) $post_types );
 
-	$key = "lastpost{$field}:$blog_id:$timezone:" . wp_cache_key( $post_types );
+	$key = "lastpost{$field}:$blog_id:$timezone:" . md5( serialize( $post_types ) );
 
 	$date = wp_cache_get( $key, 'timeinfo' );
 
@@ -5048,4 +5048,4 @@ function wp_quickpress_form( $args = array(), $post_type = 'post'){
 	endif;
 }
 
-?>
\ No newline at end of file
+?>