PHP
Some short info on how to use PHP here at CS.
How?
Name a file "something.php" and put it under your ~/public_html
and it will be run under PHP as your user. Technically, it will be run as
CGI-PHP (not mod_php).
Versions
Before 2018-02-01, we used PHP5. After 2018-02-01, we use PHP7.
Further reading
http://se.php.net/http://se.php.net/migration7/