I'm using Mpdf to make some values I've saved in SESSIONS in php become a report, so that's fine, but the page I want to turn into report has Highcharts Js graphics, I do not know how to export those graphics directly for the report that will be in pdf.
Website: link
Steps: Click Carbon per filter (menu) > > calculate carbon > > WHRC
An example of this would be:
var hightchart = $('#container').highcharts().getSVG(); // Pega o highcharts e transforma em SVG.
Send the result by ajax to php, and then include it in your mpdf:
$html = "Olha um gráfico: ". $_POST['hightchart '];
include 'lib/mpdf/mpdf.php';
$mpdf = new mPDF();
$mpdf->WriteHTML($html);
$mpdf->Output('exemplo.pdf', 'I');
Example: Transforming graphic into image
Documentation: Highcharts Chart.getSVG
To generate PDF tries to use a library called wkhtmltopdf, it is an interesting project that transforms into PDF the page rendered by the webkit, Google rendering engine.
If graphics are empty, try disabling highcharts animations.