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    • WHMCS Hooks

    WHMCS Hooks: List, Examples, and add_hook() Guide

    A WHMCS hook is a PHP callback registered with add_hook(). WHMCS runs it when a named event fires (invoice paid, order placed, client login). Hook files live in /includes/hooks/ or inside a module, so upgrades do not overwrite them. WHMCS already has an answer for this. Hooks let you extend the platform with your own…

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