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WordPress Core Application Programming Interface, commonly abbreviated as WordPress Core APIs is a collection of several individual APIs and each API covers the functions involved in adding a particular set of functionality to WordPress. Together, they provide an interface for WordPress developers to write plugins and themes which can interact with the core. ↔️

Using these APIs, you can leave the heavy lifting to the WordPress Core and be assured that your code is backward-compatible and future-proof.

Now that you have understood what WordPress Core APIs are, you can have a look at the below APIs to understand how to extend the functionality offered by WordPress through plugins.

• Plugin API
• Settings API
• Options API
• Metadata API
• HTTP API
• Database API
• Transients API
• Shortcode API
• Rewrite API
• Dashboard Widgets API
• Theme Modification API
• Filesystem API
• Global Variable API
• HTTP API
• XML-RPC WordPress API