// 错误输出
function halt($error) {
    $e = array();
    if (APP_DEBUG) {
        //调试模式下输出错误信息
        if (!is_array($error)) {
            $trace = debug_backtrace();
            $e['message'] = $error;
            $e['file'] = $trace[0]['file'];
            $e['class'] = $trace[0]['class'];
            $e['function'] = $trace[0]['function'];
            $e['line'] = $trace[0]['line'];
            $traceInfo = '';
            $time = date('y-m-d H:i:m');
            foreach ($trace as $t) {
                $traceInfo .= '[' . $time . '] ' . $t['file'] . ' (' . $t['line'] . ') ';
                $traceInfo .= $t['class'] . $t['type'] . $t['function'] . '(';
                $traceInfo .= implode(', ', $t['args']);
                $traceInfo .=')
';
            }
            $e['trace'] = $traceInfo;
        } else {
            $e = $error;
        }
        // 包含异常页面模板
        include C('TMPL_EXCEPTION_FILE');
    } else {
        //否则定向到错误页面
        $error_page = C('ERROR_PAGE');
        if (!empty($error_page)) {
            redirect($error_page);
        } else {
            if (C('SHOW_ERROR_MSG'))
                $e['message'] = is_array($error) ? $error['message'] : $error;
            else
                $e['message'] = C('ERROR_MESSAGE');
            // 包含异常页面模板
            include C('TMPL_EXCEPTION_FILE');
        }
    }
    exit;
}