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1. emcdonald
   Member
   Posted 4 years ago #

   The plugin to determine visitor location via IP was demanding a lot from my DB, so it seemed like the obvious solution was to wrap it in a script which first checked if the location was set in a cookie, and if not, invoke the visitor location plugin, and set it in a cookie. This plugin was super-short, and seemed within my abilities.

   However, turning on my new plugin causes Warning: call_user_func_array() : First argumented is expected to be a valid callback, 'location_isset()' was given in /blah/blah/blah/wordpress/wp-includes/plugin.php</b> on line 311 Renaming it causes it to go away.

   I'm hoping I've made a very stupid error which someone will easily be able to point out.

2. Austin Matzko
   Member
   Posted 4 years ago #

   That will be tough to do without seeing any of the code, but from the error it sounds like you've assigned a nonexistent function to an action or filter hook.

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