The Meta Box User Meta extension is a lightweight, developer-focused tool designed to attach custom fields specifically to WordPress user profiles. Unlike the core plugin which targets posts, this extension bridges the gap to user objects.
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To run the User Meta extension effectively, your environment should meet these standards:
WordPress Version: 6.5 or higher (Recommended).
PHP Version: 7.4 or higher (Minimum 7.1).
Core Plugin: Requires the framework (free) to be active.
The extension essentially “re-routes” the standard Meta Box API to target the wp_usermeta table instead of wp_postmeta.
Registering user fields follows the standard Meta Box syntax but requires a specific type parameter.
To pull this data in your theme or plugin, use the rwmb_meta helper function with the object_type specified:
Clean Codebase: The extension is modular and only loads its assets on user-related admin screens to prevent bloat.
Custom Tables: If you have tens of thousands of users and high metadata volume, it integrates with the MB Custom Table extension to store user data in a dedicated SQL table, significantly speeding up queries.
