The order is determined in, well, how WordPress is coded. If you're trying to change the action execution sequence, you'll have to edit the WordPress core files (and break a lot of things).

If you're trying to make sure certain things are executed before anything else, you can just change how you hook into WordPress' actions.

Keep in mind that certain WordPress functions (such as is_single(), is_home(), etc.) will only work after specific WordPress hooks have run.

Loads of more information is here: How to get WordPress' hooks/actions run sequence?

The order is determined in, well, how WordPress is coded. If you're trying to change the action execution sequence, you'll have to edit the WordPress core files (and break a lot of things).

If you're trying to make sure certain things are executed before anything else, you can just change how you hook into WordPress' actions.

Keep in mind that certain WordPress functions (such as is_single(), is_home(), etc.) will only work after specific WordPress hooks have run.

Loads of more information is here: How to get WordPress' hooks/actions run sequence?