Wordpress网站中的“已发送标头”错误

I'm working on a Wordpress site and I have set an SSL certificate. I got the following error,

Warning: Cannot modify header information - headers already sent by (output started at /var/www/mylink/wp-config.php:1) in /var/www/mylink/data/www/mylink/wp-login.php on line 411 Warning: Cannot modify header information - headers already sent by (output started at /var/www/mylink/data/www/mylink/wp-config.php:1) in /var/www/mylink/data/www/mylink/wp-login.php on line 424.

I have tried blank spaces, echo before php tag, and many more but was not able to solve this issue. I'm not able to open my admin panel and when I open my site with wp-admin URL, it shows only the above error. If I open my admin panel with wp-login.php, it shows login page but I'm not able to logged in. Any help is appreciated. Thanks. Please check the image for further clarification.

Did you try below solution? ob_start(); ob_get_clean(); It will do get current buffer contents and delete current output buffer.