Error missing MySQL extension

Question

Yesterday I delete some files to clean up my storage. After that, I face the following error while visiting my website.

Your PHP installation appears to be missing the MySQL extension which is required by WordPress.

I delete my WordPress Old Setup and Install New one, but the problem still exists. What's the possible solution to recover my website. Thank you

Answer 1

The solution to this will require server level changes, this isn't something you can fix by changing PHP files. Your host needs to install the mysqli PHP extension