Looking at the Settings API and you can register new setting using register_setting() but I can't find a way of getting all the settings for a certain plugin.

Let's say I want to get a list with all settings for pluginA, how would you do it?

  • If I'm not wrong, the 2nd parameter of register_setting() is actually the option_name of options table. If you are putting multiple fields under a same setting, the option_value would be an array, otherwise would be a string. And you can get each of those register_setting very simply by putting get_option('option_name') Nov 18, 2015 at 15:42

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Setting aren't registered in the database by plugin, though a plugin should be using an identifying prefix. That is, there is no specific queryable cross-linking in the database between plugin and setting. The only way to way to pull all settings for a plugin is to know what keys the plugin has used to save those settings.

  • any suggestion how do I get to know what keys the plugin has used to save those settings? I mean, I could open the plugin and read it, but I want to be able to do it automatically so how could I write code that reads which keys have been used to save the settings?
    – user83847
    Nov 18, 2015 at 15:42
  • find all the files of that plugin for string like register_setting if the plugin uses Settings API. Nov 18, 2015 at 15:44
  • Look at the plugin source. Read through the code. That's it. I guess you could grep for register_setting or update_option... things like that.
    – s_ha_dum
    Nov 18, 2015 at 15:45
  • "... how could I write code that reads which keys..." -- your code will have to open the plugin source and read it, which is a complex project. There is no other way besides reading the plugin code.
    – s_ha_dum
    Nov 18, 2015 at 15:48

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