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Is there an action hook when a new plugin is installed?

I want to hook into the moment when a new plugin was put into the /wp-content/plugins folder. So really just adding the plugin (either via upload or via installation through the admin interface to pick plugins for installation).

Please note I am not referring to the activation of a plugin (activated_plugin does that trick).

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  • There's no hook for that that I know of. hookr.io is pretty useful for browsing all of the hooks at once.
    – admcfajn
    Commented Jan 10, 2022 at 22:57
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    you would need to check for this on every single request and then fire a hook yourself to catch when someone drops a plugin in that folder via FTP or other means, which could be costly. You'd also need to maintain a list. What's the reason for wanting to do this? What are you trying to do that requires it?
    – Tom J Nowell ♦
    Commented Jan 11, 2022 at 0:44
  • Is it your plugin that you can code?
    – brothman01
    Commented Jan 11, 2022 at 18:39
  • There is a need for a server-side script, nothing to do with WordPress.
    – Max Yudin
    Commented Jan 11, 2022 at 21:38
  • @TomJNowell Adding folders via FTP is out of scope. I am only concerned what WordPress offers via the admin UI. So the package upload and "online install" from the WP.org repo. I had hoped I can get an info for that cases.
    – hbit
    Commented Jan 11, 2022 at 22:24

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I think it's a bit tricky but using https://developer.wordpress.org/reference/hooks/plugin_loaded/ to know if the plugin has just been activated.

I think check if a plugin is added to get_option('active_plugins');

And doing your stuff when you detect something new

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  • How does this help to recognize the plugin installation? Again: not talking about the activation with my question.
    – hbit
    Commented Jan 11, 2022 at 22:38

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