--- /dev/null
+<?php
+/**
+ * Copyright 2014
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ * http://www.gnu.org/copyleft/gpl.html
+ *
+ * @file
+ */
+
+/**
+ * Interface for mutable configuration instances
+ *
+ * @since 1.24
+ */
+interface MutableConfig {
+
+ /**
+ * Set a configuration variable such a "Sitename" to something like "My Wiki"
+ *
+ * @param string $name Name of configuration option
+ * @param mixed $value Value to set
+ * @throws ConfigException
+ */
+ public function set( $name, $value );
+}