Is there way to run a code every time when any cron is run?

Question

publish_post is an action triggered whenever a post is updated and its new status is "publish".

Is there similar action which is trigger when cron is run including WordPress default crons?

I am building a plugin which logged details about every crons. Something like this cron runs at this time, this crons run at this time, etc..... That's why I need this .

Answer 1

There is such way, I guess...

When you schedule and event with wp_schedule_event all you really do is:

Schedule a hook which will be executed by the WordPress actions core on a specific interval...

And if you'll take a look at wp-cron.php then you'll see, that on line 126 this happens:

do_action_ref_array( $hook, $v['args'] );

OK... So how does it solve the problem?

It does, because you can use all hook. Actions assigned to that hook are called everytime any filter/action is called.

And you can, at least I believe so, use wp_next_scheduled to check, if given hook is event hook or not.