Index: class-http.php
===================================================================
--- class-http.php	(revision 15264)
+++ class-http.php	(working copy)
@@ -911,6 +911,9 @@
 	 * @return boolean False means this class can not be used, true means it can.
 	 */
 	function test($args = array()) {
+		if ( version_compare(PHP_VERSION, '5.0', '>=') ) // PHP4 only backwards compat.
+			return false;
+
 		if ( ! function_exists('fopen') || (function_exists('ini_get') && true != ini_get('allow_url_fopen')) )
 			return false;