I want something like this,
$current_date = date("m/d/Y");
//get the bookmark and create a new MS Word Range (to enable text substitution)
$bookmarkname = "TODAYDATE";
$objBookmark = $word->ActiveDocument->Bookmarks($bookmarkname);
$range = $objBookmark->Range;
//substitute the bookmark with actual value
$range->Text = $current_date;