Available from version 1.10.0
called before displaying a page with action=raw. Returns true if display is allowed, false if display is not allowed.
Define function:
public static function onRawPageViewBeforeOutput( &$rawAction, &$text ) { ... }
Attach hook: In extension.json:
	"Hooks": {
		"RawPageViewBeforeOutput": "MediaWiki\\Extension\\MyExtension\\Hooks::onRawPageViewBeforeOutput"
Called from: File(s): actions/RawAction.php
Interface: RawPageViewBeforeOutputHook.php

For more information about attaching hooks, see Manual:Hooks .
For examples of extensions using this hook, see Category:RawPageViewBeforeOutput extensions.