< Manual:Hooks 
 
      |  | This feature was removed from MediaWiki core in version 1.37.0 (after being deprecated in 1.35.0). Please see DifferenceEngineViewHeader for an alternative way to use this feature. | 
| DiffViewHeader | |
|---|---|
| Available from version 1.7.0 Removed in version 1.37.0 Called before diff display | |
| Define function: | public static function onDiffViewHeader( $diff, $oldRev, $newRev ) { ... }
 | 
| Attach hook: | In extension.json: {
	"Hooks": {
		"DiffViewHeader": "MyExtensionHooks::onDiffViewHeader"
	}
}
 | 
| Called from: | File(s): diff/DifferenceEngine.php | 
| Interface: | DiffViewHeaderHook.php | 
For more information about attaching hooks, see Manual:Hooks.
For examples of extensions using this hook, see Category:DiffViewHeader extensions.
Details
- $diff - DifferenceEngine object that's calling
- $oldRev - Revision object of the "old" revision (may be null/invalid)
- $newRev - Revision object of the "new" revision
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