PHP Warning: Constant WP_CONTENT_URL already defined

You’ve got that constant defined in two places. The error message tells you where it is first defined:

     Warning: Constant WP_CONTENT_URL 
already defined in 
/var/www/html/my-website/wp-config.php on line 11

Look at line 11 of the wp-config.php file. I’d bet that you’ll find that constant defined there.

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)