Help with Php/Databases/phpmyadmin

Hello! Could anyone find a tutorial that explains php and databases for me? I have a nice website up, and am pretty good at html, css, and javascript, but i dont seem to understand the point of php. i would also like to add a search bar to my site.
Any help?

@Vincent1 Hope this helps you.
https://www.bitdegree.org/learn/ajax-search

Thanks! I’ll check it out! :grinning: