From 95166aa0cfacc3925971d5b97c6025ecfa20bd3d Mon Sep 17 00:00:00 2001
From: Dion Hulse <dd32@git.wordpress.org>
Date: Sun, 17 Jan 2010 02:44:47 +0000
Subject: [PATCH] Fix wp_mkdir_p() when running under safe_mode on certain PHP
 versions. Props Denis-de-Bernardy. Fixes #8830

git-svn-id: https://develop.svn.wordpress.org/trunk@12740 602fd350-edb4-49c9-b593-d223f7449a82
---
 wp-includes/functions.php | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/wp-includes/functions.php b/wp-includes/functions.php
index ad1e7a7ca0..1afbaff1f6 100644
--- a/wp-includes/functions.php
+++ b/wp-includes/functions.php
@@ -1933,6 +1933,12 @@ function wp_get_original_referer() {
 function wp_mkdir_p( $target ) {
 	// from php.net/mkdir user contributed notes
 	$target = str_replace( '//', '/', $target );
+
+	// safe mode fails with trailing slash under certain PHP versions.
+	$target = untrailingslashit($target);
+	if ( empty($target) )
+		$target = '/';
+
 	if ( file_exists( $target ) )
 		return @is_dir( $target );