It is not indenting when editing .php files with vim

Solution:

https://stackoverflow.com/questions/459478/correct-indentation-of-html-and-php-using-vim

:set filetype=html

How to debug or test python scripts using inspect module and print and input?

https://stackoverflow.com/questions/3056048/filename-and-line-number-of-python-script

At the top of your script, 

from inspect import currentframe, getframeinfo

At the spot where you want to print the value of a variable,

print(f'Line #{getframeinfo(currentframe()).lineno}:\nDescription:\n{varName}\nEnd of Description\n')

input()

Is there an easier way to reselect the previous selection?

https://www.reddit.com/r/vim/comments/6v4i4u/is_there_an_easier_way_to_reselect_the_previous/

In normal mode, you can use gv to re-select the previous visual selection.

If you just want to re-issue an additional ex command over the same range, you can use * on the command line, as long as "*" isn't in your 'cpoptions' setting.

:'<,'>s/foo/bar/g
:*s/baz/bat/g
:help cpo-star
:help :*
:help v_:

How to View Free Disk Space and Disk Usage From the Linux Terminal

https://www.howtogeek.com/409611/how-to-view-free-disk-space-and-disk-usage-from-the-linux-terminal/