当我尝试使用Imghost脚本上传图片时，我上传它然后我收到了错误
**Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /home/****/public_html/config.php:1) in /home/*****/public_html/upload.php on line 20**
这显示在第20行require_once（'config.php'）;
中$ dbconnect = new db（）; $ dbconnect-＆GT;连接（）;在session_start（）;如果 （UPLOAD_ONLY_REGISTERED == 1）{ if（！isset（$ _ SESSION ['user_id']））{ header（'Location：register.php'）; 出口（）; }}＆gt;
此外，我尝试登录管理面板并获取此
**Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /home/*****/public_html/config.php:1) in /home/****/public_html/inc/functions.php on line 210**
**Warning: Cannot modify header information - headers already sent by (output started at /home/****/public_html/config.php:1) in /home/****/public_html/inc/functions.php on line 255**
function.php http://justpaste.it/dt6w
的整个文件如何解决这些错误？