500 Internal Server Error on $pdf->setSourceFile()

Question

I want to add a png-image to an existing pdf file. Therefore I'm trying to integrate FPDI/FPDF into my project, that is based on the SLIM framework with ELOQUENT.

FPDI/FPDF is added with composer ( composer require setasign/fpdi-fpdf ).

I successfully testet the following code in a single php file ("pdf_test.php") directly opened in the browser:

require_once('../vendor/setasign/fpdf/fpdf.php');
require_once('../vendor/setasign/fpdi/fpdi.php');

$pdf = new FPDI();
$filename = '1005236946.pdf';
$pageCount = $pdf->setSourceFile($filename);
$templateId = $pdf->importPage(1);
$pdf->useTemplate($templateId);
$pdf->Image('9959544245.png',268,184,20, 'PNG');
$pdf->Output('F', '1005236946_PNG.pdf');

But when I use this code in SLIM route ("/php_test") I get a "500 Internal Server Error" at this point:

$pageCount = $pdf->setSourceFile($filename);

I've checked that the $pdf-object is created well.

I searched the web but found nothing so far that could help. Maybe it has to do something with the Apache Server and the .htaccess file... ?

Any help very appreciated :-)

Answer 1

error_log: PHP Warning: require(../app/models/pdf_parser.php):

This means that the autoload implementation doesn't check if a file exists and simply requires it. Because of such strange implementation a simple class_exist() call (which is the case here) on an not existing class will produce this error.

So fix the autoload implementation or require the parser separately:

require_once('../vendor/setasign/fpdi/pdf_parser.php');

Also I'm unsure why you require both script manually and why you do not use the autoloader of composer. (Wouldn't change the behaviour but would make more sense)