Post Meta and Custom Fields
Read, write, sanitize, and register post metadata in WordPress PHP.
Metaboxes and Save Handlers
Add classic editor metaboxes with nonce, autosave, capability, and sanitization checks.
Options, Settings API, and Autoloading
Store plugin settings safely and avoid autoload performance problems.
1. Custom Fields, Metaboxes, and Settings
Store structured WordPress data with post meta, metaboxes, options, and the Settings API.