Added missing open_basedir checks

Author: Ilia Alshanetsky

ext/session/mod_files.c

@@ -251,6 +251,13 @@ PS_OPEN_FUNC(files)
 	if (*save_path == '\0') {
 		/* if save path is an empty string, determine the temporary dir */
 		save_path = php_get_temporary_directory();
+
+		if (PG(safe_mode) && (!php_checkuid(save_path, NULL, CHECKUID_ALLOW_ONLY_DIR))) {
+			return FAILURE;
+		}
+		if (php_check_open_basedir(save_path TSRMLS_CC)) {
+			return FAILURE;
+		}
 	}
 
 	/* split up input parameter */