Edit File: config.default.php
<?php // [default config] // DO NOT rename/delete/modify this file which will be overwritten when upgrade // See config.example.php instead // $config['include_paths'] = array(); // $config['exclude_paths'] = array(); $config['syntax_higlight'] = true; $config['use_cache'] = false; // $config['datadir'] is default to ini_get("xcache.coveragedump_directory")