add licence

Author: brettmc

examples/http-client/tests/php/router.php

@@ -1,3 +1,14 @@
 <?php
+
+// Copyright (c) 2022 PHPER Framework Team
+// PHPER is licensed under Mulan PSL v2.
+// You can use this software according to the terms and conditions of the Mulan
+// PSL v2. You may obtain a copy of Mulan PSL v2 at:
+//          http://license.coscl.org.cn/MulanPSL2
+// THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY
+// KIND, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO
+// NON-INFRINGEMENT, MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
+// See the Mulan PSL v2 for more details.
+
 header('Content-Type: text/plain');
 echo "Hello phper!";