How to check for passed options using getopts in a POSIX shell? (Report, count, and discard.)

How to check for passed options using getopts (man page) in a POSIX shell? (Report, count, and discard.) My idea is this: Many of my scripts take no options (not even -h for help, I am transitioning to help directly. And so, if any number of options (switches) is given, I want to count them, report them, and simply discard them (Don't do any action on them). Let's include all 0-9, and both lower and upper a-z (A-Z). --- **Update:** Many of my scripts do not take even files as arguments, and that is the case with this script. --- **Usage** help looks like this:

usage ()
{
cat << EOF
MPV video player subtitles enable/disable toggling
--------------------------------------------------
on              Enable  subtitles toggling in MPV.
off             Disable subtitles toggling in MPV.
help            Print this help message.
version         Print the script version.
EOF
}