WordPress hooks for executing right before any action or page loading
A list of all available hooks can be found here: https://codex.wordpress.org/Plugin_API/Action_Reference
Information about Hooks: https://codex.wordpress.org/Plugin_API#Hooks.2C_Actions_and_Filters
Other hooks must be suggested and will be added in a future release if is a good suggestion.Or you'd have to edit the core files ;)