mod_php4 sets up HTTP_SERVER_VARS incorrectly. This problem occurs when:

* You're using mod_php4 with Apache
* register_globals is off.

What happens:

* You can still access PHP_SELF and PATH_TRANSLATED.
* All other members of HTTP_SERVER_VARS are missing.

To fix this bug, apply the following patch to PHP 4.0.1pl2:

--- sapi/apache/mod_php4.c-old	Sat Aug 12 21:58:57 2000
+++ sapi/apache/mod_php4.c	Sat Aug 12 21:59:20 2000
@@ -255,7 +255,7 @@
 		} else {
 			val = empty_string;
 		}
-		php_register_variable(elts[i].key, val, NULL ELS_CC PLS_CC);
+		php_register_variable(elts[i].key, val, track_vars_array ELS_CC PLS_CC);
 	}
 
 	/* insert special variables */