From 5ca36de9639a35ba034a93205f4664471f3aae77 Mon Sep 17 00:00:00 2001
From: Richard Quadling <rquadling@php.net>
Date: Tue, 7 Jun 2011 14:58:42 +0000
Subject: [PATCH] realpath prior to 5.0.0 returned the script directory rather
 than the current directory when supplied with '' or null paths. There are a
 few undocumented exceptions (at least on Windows). V4.2.0 operates the same
 way at V5.0.0+ V4.0.2 - V4.0.3 return False.

git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@311893 c90b9560-bf6c-de11-be94-00142212c4b1
---
 reference/filesystem/functions/realpath.xml | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/reference/filesystem/functions/realpath.xml b/reference/filesystem/functions/realpath.xml
index d354d2c278..793ad1cfa7 100644
--- a/reference/filesystem/functions/realpath.xml
+++ b/reference/filesystem/functions/realpath.xml
@@ -29,6 +29,12 @@
      <listitem>
       <para>
        The path being checked.
+       <note>
+        <para>
+         Whilst a path must be supplied, the value can be blank or &null;
+         In these cases, the value is interpreted as the current directory.
+        </para>
+       </note>
       </para>
      </listitem>
     </varlistentry>
@@ -75,6 +81,13 @@
         component did not exist.
        </entry>
       </row>
+      <row>
+       <entry>5.0.0</entry>
+       <entry>
+        Prior to this release, a blank or &null; <parameter>path</parameter> would
+        cause <function>realpath</function> to return the directory name of the script.
+       </entry>
+      </row>
      </tbody>
     </tgroup>
    </informaltable>