From 0fe21a3a290dbc423f5a2d8495e2c58828830ada Mon Sep 17 00:00:00 2001
From: Zeev Suraski <zeev@php.net>
Date: Thu, 24 Jul 2003 08:02:08 +0000
Subject: [PATCH] Fix bug #19613

---
 ext/standard/basic_functions.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/ext/standard/basic_functions.c b/ext/standard/basic_functions.c
index 3466aaad7c..37dc4a2cc1 100644
--- a/ext/standard/basic_functions.c
+++ b/ext/standard/basic_functions.c
@@ -973,6 +973,8 @@ static void php_putenv_destructor(putenv_entry *pe)
 	} else {
 # if HAVE_UNSETENV
 		unsetenv(pe->key);
+# elif defined(PHP_WIN32)
+		SetEnvironmentVariable(pe->key, NULL);
 # else
 		char **env;
 
-- 
2.50.1