Don't even define this.

ext/curl/config.w32

@@ -13,7 +13,7 @@ if (PHP_CURL != "no") {
 		EXTENSION("curl", "interface.c multi.c streams.c");
 		AC_DEFINE('HAVE_CURL', 1, 'Have CURL library');
 		// TODO: check for curl_version_info
-		AC_DEFINE('PHP_CURL_URL_WRAPPERS', 0, 'Use curl for URL wrappers [experimental]');
+		// AC_DEFINE('PHP_CURL_URL_WRAPPERS', 0, 'Use curl for URL wrappers [experimental]');
 	} else {
 		WARNING("curl not enabled; libraries and headers not found");
 	}