Images from server with self signed certificate are not added

[riksoft]

In a dev environment where obviously I only use a self signed certificate and PHP that works with it this way

//Allow self signed certificate
$fgOptions = array(
	"ssl" => array(
		"verify_peer" => false,
		"verify_peer_name" => false,
	)
);
$html = file_get_contents($urlTpl, false, stream_context_create($fgOptions));

it happens that (I simplify a lot showing only the important parts)

$pdf->writeHTML($html, true, false, false, false, '');
$pdf->Output("Cod_$gid.pdf", 'I');

opens the pdf showing data but not images. No problem with a real certificate online. No problem using http instead of https.

Here the important part If instead of writeHTML() I use a simpler echo $html; the pdf, despite a bit of a mess, it really shows the images. So the problem it's somewhere in writeHTML() or the Output() function.

One way to circumvent the problem is to change the $html content on the fly renaming https into http so that the images, but would be better if it worked without a workaround.