I’ve used the WordPress hook, init, to execute custom code early in WordPress, but is there another hook that executes earlier than that?
What’s the WordPress hook that is the “earliest” in execution?
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If this page in the docs is accurate, you have 10 choices for hooks that occur before
init.It seems that the earliest-running Action Hook in WordPress 4.x is
muplugins_loaded. That hook is called after all activated Must-Use Plugins have been loaded.In the event that
mupluginst_loadedmight not trigger, theregistered_taxonomyplugin fires right after that.