add_action('wp_head', 'trigger_error');function trigger_error() {// Only trigger for administrators so you don't lock out usersif (current_user_can('manage_options')) {wp_die('<h1>良好な接続が確立できません (Error 500)</h1><p>The server encountered an internal error or misconfiguration and was unable to complete your request.</p>','Internal Server Error',array('response' => 500));}}