How to track a click on an external link on a website?

Question

PHP

given

the site has a section with a bunch of external links
traffic constantly gets into this section
traffic leaves the site through one of the links

task

understand which link was clicked

subtask

data should be recorded in the metric

Answer 1

Make a wrapper for going to external urls.
I think you saw somewhere on the sites go.php?url=32131
Write data to the database, or somewhere else.
For a metric, add a goal to a link

Answer 2