PHPOffice/PHPWord — pull request #353 by moromete (2014-08-29 07:29:57+00:00)
Title:  added changed information to text element so we can mark it as inserted or deleted #350 

If you want to enable track changes on added text you can mark it as INSERTED or DELETED by a specific user at a given time:

$text = $section->addText('Hello World!');
$text->setChanged(\PhpOffice\PhpWord\Element\ChangedElement::TYPE_INSERTED, 'Fred', time());