Question

I’m trying to use the writeHTML script (here: http://www.fpdf.org/en/script/script41.php) as well as the header and footer from tutorial 6 (here: http://www.fpdf.org/en/tutorial/tuto2.htm).

My code looks like this:

<?php
require_once('WriteHTML.php');

class PDF extends FPDF
{
     // Page footer
     function Footer()
     {

     $this->SetY(-30);
     $this->SetFont('Arial','I',8);     
     $this->Cell(0,10,'Page '.$this->PageNo(),0,0,'C');
     $html = '<p>some HTML</p>';

     $this->WriteHTML($html);
     }

     // Some more functions... header, PrintChapter etc... 
}

$pdf = new PDF();
$pdf->SetTitle($title);
$pdf->AddPage();
$pdf->PrintChapter(1,'A RUNAWAY REEF','test.txt'); // print text file content
$pdf->Output();
?>

I’m getting the following error:

Call to undefined method PDF::WriteHTML() in /path/to/test2.php on line 15

What am I missing here?

Answer 1

You need to extend PDF_HTML, not FPDF as WriteHTML is part of PDF_HTML.

If you want inheritance to work, you always need to extend the classes you want to use. Let say you want to extend PDF_Index, you still need WriteHTML in the inheritance somewhere.

Perhaps

PDF extends PDF_Index 

and

PDF_Index extends PDF_HTML

Or,

PDF_HTML extends PDF_Index

But you need both in the chain to make it work.

If you don’t put both in the inheritance chain, then you will not use the available functions from the branch you are not using.

       ---> PDF_HTML
     /
FPDF ----> PDF_Index ----> PDF

The, the function in PDF_HTML will not be available to PDF