I need to set a session value in my plugin, but session isn’t started when WordPress loads my plugin and I don’t want to run if (!session_id()) session_start(); manually, because other plugins might rely on setting cookies, etc and face a “headers already sent error”.
Is there any hook in WordPress that runs after session is started?
If not, how do you professionals handle such situations?
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Answer
WordPress does not use session. There are actually a number of reasons for this outlined very well in this stackexchange post:
I would say if you are concerned about stepping on a plugin’s toes, try hooking into “plugins_loaded” and use that hook as an entry for your plugin (if you can, I know that will limit functionality somewhat). But because WordPress does not start a session itself it is really a coin toss whether you are interrupting another plugin or not.