GetExtension

:::info[Note] This is a point-in-time snapshot of the API documentation from January 2026. Going forward, we will not be maintaining a public copy of these references, and recommend users to refer to the built-in signature helpers available in the Hack LSP instead for complete and up-to-date information. :::

( excerpt from http://php.net/manual/en/reflectionclass.getextension.php )

public function getExtension(): ?ReflectionExtension;

Gets a ReflectionExtension object for the extension which defined the class.

Returns

• mixed - A ReflectionExtension object representing the extension which defined the class, or NULL for user-defined classes.