Trying to run website a php file is blank

That’s normal and expected inside the wp-content, themes, and plugins directories. Their presence is to prevent listing of directory contents if people navigate to those directories via http. There’s nothing wrong there and no fix is required.

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