CODEWITHSUNDEEP
php
silentw
silentw

Reputation: 4885

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

Upvotes: 1

Views: 1607

Answers (3)

Fabio Mora
Fabio Mora

Reputation: 5479

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();

Upvotes: 3

Mike Brant
Mike Brant

Reputation: 71384

If you are specifically only trying to inject the $producto variable. It would be easy enough to make one change in your code like this:

function Header($producto){

This will allow you to pass a parameter to the Header function call.

Like this:

$tfpdf = new tFPDF();
$tfpdf->Header($producto);

If you really want to pass the value at the time of instantiation, then you need to define a constructor function, and probably a class property to store your $producto value. You would then pass the $producto value into the contructor and set the property accordingly. Then in your header function you would reference $this->producto instead of $producto.

Upvotes: 0

Matt
Matt

Reputation: 7040

Your best bet is to use the __construct() method with a default parameter for $myString

class PDF extends tFPDF{
    public $somestring;

    function __construct($myString = '') {
        parent::__construct();
        $this->somestring = $myString;
    }

    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');
    }
}

Upvotes: 1

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