Notice: Trying to access array offset on value of type null - Only when SetFontSize() doesn't have 12 passed in

[sterichards]

So this is a strange problem and here is my code:

`$pdf = new Fpdi();
$pdf->AddPage($audit->getCertificateVersion()->getOrientation());
$pdf->setSourceFile($pdfLocation);

    $page1 = $pdf->importPage(1);
    $pdf->useTemplate($page1);

    foreach ($audit->getCertificateTextItems() as $certificateTextItem) {
		$pdf->SetFontSize(20);
        $pdf->SetFont(ucfirst(strtolower($certificateTextItem->getCertificateTextPlacement()->getCertificateTextPlacementFont()->getName())));
        $pdf->SetTextColor(
			$certificateTextItem->getCertificateTextPlacement()->getR(),
			$certificateTextItem->getCertificateTextPlacement()->getG(),
			$certificateTextItem->getCertificateTextPlacement()->getB()
        );

        // Set position. We divide by an offset because the X/Y pos values against the certificate text placement are CSS PX values
        // because they are set by a frontend interface
        $x = ( $certificateTextItem->getCertificateTextPlacement()->getXPos() * (25.4 / 96) ) - SELF::XOFFSET;
        $y = ( $certificateTextItem->getCertificateTextPlacement()->getYPos() * (25.4 / 96) ) + SELF::YOFFSET;
        $pdf->SetXY(
            $x,
            $y
        );

        // Add data to position
        $pdf->Write(0, $certificateTextItem->getText());
        $pdf->SetXY(0, 0);
    }`

This code will always fail with:

{ "error": { "code": 500, "message": "Internal Server Error", "exception": [ { "message": "Notice: Trying to access array offset on value of type null", "class": "ErrorException", "trace": [ { "namespace": "", "short_class": "", "class": "", "type": "", "function": "", "file": "/var/www/html/vendor/setasign/fpdf/fpdf.php", "line": 530, "args": [] }, { "namespace": "", "short_class": "FPDF", "class": "FPDF", "type": "->", "function": "SetFontSize", "file": "/var/www/html/vendor/setasign/fpdi/src/FpdfTplTrait.php", "line": 403, "args": [ [ "integer", 20 ] ] }, { "namespace": "setasign\\Fpdi", "short_class": "FpdfTpl", "class": "setasign\\Fpdi\\FpdfTpl", "type": "->", "function": "SetFontSize", "file": "/var/www/html/src/Controller/CertificateGenerator/CertificateGenerator.php", "line": 28, "args": [ [ "integer", 20 ] ] }, { "namespace": "App\\Controller\\CertificateGenerator", "short_class": "CertificateGenerator", "class": "App\\Controller\\CertificateGenerator\\CertificateGenerator", "type": "->", "function": "generate", "file": "/var/www/html/src/Controller/Certificate/Rest/CertificateRestController.php", "line": 54, "args": [ [ "object", "App\\Entity\\Audit\\Audit" ] ] }, { "namespace": "App\\Controller\\Certificate\\Rest", "short_class": "CertificateRestController", "class": "App\\Controller\\Certificate\\Rest\\CertificateRestController", "type": "->", "function": "downloadAction", "file": "/var/www/html/vendor/symfony/http-kernel/HttpKernel.php", "line": 158, "args": [ [ "string", "2" ] ] }, { "namespace": "Symfony\\Component\\HttpKernel", "short_class": "HttpKernel", "class": "Symfony\\Component\\HttpKernel\\HttpKernel", "type": "->", "function": "handleRaw", "file": "/var/www/html/vendor/symfony/http-kernel/HttpKernel.php", "line": 80, "args": [ [ "object", "Symfony\\Component\\HttpFoundation\\Request" ], [ "integer", 1 ] ] }, { "namespace": "Symfony\\Component\\HttpKernel", "short_class": "HttpKernel", "class": "Symfony\\Component\\HttpKernel\\HttpKernel", "type": "->", "function": "handle", "file": "/var/www/html/vendor/symfony/http-kernel/Kernel.php", "line": 201, "args": [ [ "object", "Symfony\\Component\\HttpFoundation\\Request" ], [ "integer", 1 ], [ "boolean", true ] ] }, { "namespace": "Symfony\\Component\\HttpKernel", "short_class": "Kernel", "class": "Symfony\\Component\\HttpKernel\\Kernel", "type": "->", "function": "handle", "file": "/var/www/html/public/index.php", "line": 36, "args": [ [ "object", "Symfony\\Component\\HttpFoundation\\Request" ] ] } ] } ] } }

Unless I use $pdf->SetFontSize(12). If I use anything higher or lower than 12, the above error happens

[JanSlabon]

This error is triggered in FPDF because you didn't set a font before you try to set its size. Just pass the font-size as the 3rd parameter of the SetFont() method and the errro should be gone.

[sterichards]

This error is triggered in FPDF because you didn't set a font before you try to set its size. Just pass the font-size as the 3rd parameter of the SetFont() method and the errro should be gone.

Good man! That worked a treat. Thank you! :)

[SamJohnSocial129]

@JanSlabon can share the code sample

This error is triggered in FPDF because you didn't set a font before you try to set its size. Just pass the font-size as the 3rd parameter of the SetFont() method and the errro should be gone.

can you share code sample?

[JanSlabon]

e.g. $pdf->SetFont('Helvetica', '', 20);

or:

$pdf->SetFont('Helvetica');
$pdf->SetFontSize(20);