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

One method is:

tar -cf my_archive.tar $( find -name "*.php" -or -name "*.html" )

There are some caveats with this method however:

1. It will fail if there are any files or directories with spaces in them, and
2. it will fail if there are so many files that the maximum command line length is full.

A workaround to these could be to output the contents of the find command into a file, and then use the "-T, --files-from FILE" option to tar.