that as of Twig 1.16.0, ``urlencode`` **always** uses ``rawurlencode`` (the
``raw`` argument was removed.)
-.. _`urlencode`: http://php.net/urlencode
-.. _`rawurlencode`: http://php.net/rawurlencode
-.. _`http_build_query`: http://php.net/http_build_query
+.. _`urlencode`: https://secure.php.net/urlencode
+.. _`rawurlencode`: https://secure.php.net/rawurlencode
+.. _`http_build_query`: https://secure.php.net/http_build_query