如何使用PHP在多维数组中获取特定值？

I have an array like this:

我有一个像这样的数组:

  pnotifyArr[] = array( 
    "type" => "New ".$RowP[0]."</br>",
    "title" => "<a href=\"/sys/mailbox/MailInbox.php?ID=$RowP[3]$rid\" onclick=\"javascript:update_status('$RefID')\" target=\"_blank\">".$TitleForShow."</a></br>", 
    "AssignedBy" => "From: ".trim($RowP[2]).".", 
    "RefID"=>$RefID, 
    "Status"=>$Status, 
    "Notice_type" => $TypeN, 
    "Notice_title" => $TitleForShow, 
    "Notice_AssignedBy" => $RowP[2]
  );
  pn