将变量传递给扩展另一个的类

Question

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

Answer 1

You could use a protected var and declare a setter.

class PDF extends tFPDF {

protected $_produto = NULL;

public function Header(){
    /* .. */
    $this->Cell(247,10,$this->_getProduto(),0,0,'C',false);
    /* .. */
}

public function Footer(){
    /* .. */
}

public function setProduto($produto) {
    $this->_produto = $produto;
}

protected function _getProduto() {
    return $this->_produto;
}

}

// Using example 
$pdf = new PDF();
$pdf->setProduto('Your Value');
$pdf->Header();