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Available from version 1.21.0
Allow modifying the wikitext that will be previewed. Note that it is preferable to implement previews for different data types using the ContentHandler facility.
Define function:
public static function onEditPageGetPreviewContent( $editPage, &$content ) { ... }
Attach hook: In extension.json:
	"Hooks": {
		"EditPageGetPreviewContent": "MyExtensionHooks::onEditPageGetPreviewContent"
Called from: File(s): EditPage.php
Interface: EditPageGetPreviewContentHook.php

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


  • $editPage: The EditPage object
  • &content: Content object to be previewed (may be replaced by hook function)