How to tar certain file types in all subdirectories?

Question

I want to tar and all .php and .html files in a directory and its subdirectories. If I use

tar -cf my_archive *

it tars all the files, which I

Answer 1

This will handle paths with spaces:

find ./ -type f -name "*.php" -o -name "*.html" -exec tar uvf myarchives.tar {} +