Fix bug #69033 (Request may get env. variables from previous requests if PHP works as FastCGI)

Author: Tyrael

NEWS

@@ -98,6 +98,8 @@ PHP                                                                        NEWS
 - Standard:
   . Fixed bug #65272 (flock() out parameter not set correctly in windows).
     (Daniel Lowrey)
+  . Fixed bug #69033 (Request may get env. variables from previous requests
+    if PHP works as FastCGI). (Anatol)
 
 - Streams:
   . Fixed bug which caused call after final close on streams filter. (Bob)

ext/standard/basic_functions.c

@@ -3433,6 +3433,9 @@ static void php_putenv_destructor(putenv_entry *pe) /* {{{ */
 		unsetenv(pe->key);
 # elif defined(PHP_WIN32)
 		SetEnvironmentVariable(pe->key, NULL);
+# ifndef ZTS
+		_putenv_s(pe->key, "");
+# endif
 # else
 		char **env;