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<?php
namespace MediaWiki\Diff\Hook;
/**
* This is a hook handler interface, see docs/Hooks.md.
* Use the hook name "DifferenceEngineOldHeaderNoOldRev" to register handlers implementing this interface.
*
* @stable to implement
* @ingroup Hooks
*/
interface DifferenceEngineOldHeaderNoOldRevHook {
/**
* Use this hook to change the $oldHeader variable in cases when there is no old revision
*
* @since 1.35
*
* @param string &$oldHeader Empty string by default
* @return bool|void True or no return value to continue or false to abort
*/
public function onDifferenceEngineOldHeaderNoOldRev( &$oldHeader );
}
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