Developer Resources

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For developers, WHMCS has all the capabilities you might need to allow you to customize, integrate & extend the core system into your own website & applications.

Contents

Display Customisation

Help & information relating to the customisation of templates and language files within WHMCS.

Extending Functionality

Detailed developer documentation & resources for how to create modules, pages and use hooks to integrate & extend system functionality.

API

The API docs provide details and code samples for interfacing with the WHMCS API from both within WHMCS itself, and outside it from custom code or third party applications.