Image data as a Variable

A PHP variable containing image data can be passed directly to mPDF. You need to allocate the data to a class variable
(you can make any name up) e.g.

$mpdf->myvariable = file_get_contents('alpha.png');

The image can then be referred to by use of "var:varname" instead of a file name, either in src="" or direct to Image() function e.g.

$html = '<img src="var:myvariable" />';
$mpdf->WriteHTML($html);

$mpdf->Image('var: myvariable',0,0);