Pass variable to a class which extends another one
===

I'm using tFPDF class.

I'm extending this class using this code to get custom Header and Footer

	class PDF extends tFPDF{
		function Header(){
		    $this->Image('../../images/logo-admin.png',10,6,30);
		    
		    $this->SetFont('DejaVu','',13);
		    $this->Cell(247,10,$produto,0,0,'C',false);
		    
		    $this->SetDrawColor(0,153,204);
		    $this->SetFillColor(98,197,230);
		    $this->SetTextColor(255);
		    $this->Cell(30,10,date('d/m/Y'),1,0,'C',true);
		    
		    $this->Ln(20);
		}
		
		function Footer(){
		    $this->SetY(-15);
		    $this->SetFont('Arial','',8);
		    $this->Cell(0,10,'P'.chr(225).'gina '.$this->PageNo().'/{nb}',0,0,'C');
		}
	}

What I need to do, is to somehow change the `$produto` with a variable that doesn't belong to the class.

I'm calling this class using `$pdf = new PDF();`.

How may I pass a variable to this class so I can use a string, something like `$pdf = new PDF('SomeString');` and use it inside the class like `$this->somestring = $somestringfromoutside`