mPDF auto print issue - php

Question

I'm using a php class, mpdf, which generates PDF's very nicely. I'm trying to get the file to automatically print (i.e., open the print dialog) when rendered. I've extended the core functioning with the code below to add javascript to the pdf. The pdf is rendered but without auto-printing. Any help would be great. Thanks!
require('mpdf.php');
class PDF_JavaScript extends mPDF {
var $javascript;
var $n_js;
function IncludeJS($script) {
$this->javascript=$script;
}
function _putjavascript() {
$this->_newobj();
$this->n_js=$this->n;
$this->_out('<<');
$this->_out('/Names [(EmbeddedJS) '.($this->n+1).' 0 R]');
$this->_out('>>');
$this->_out('endobj');
$this->_newobj();
$this->_out('<<');
$this->_out('/S /JavaScript');
$this->_out('/JS '.$this->_textstring($this->javascript));
$this->_out('>>');
$this->_out('endobj');
}
function _putresources() {
parent::_putresources();
if (!empty($this->javascript)) {
$this->_putjavascript();
}
}
function _putcatalog() {
parent::_putcatalog();
if (!empty($this->javascript)) {
$this->_out('/Names <</JavaScript '.($this->n_js).' 0 R>>');
}
}
}
class PDF_AutoPrint extends PDF_Javascript {
function AutoPrint($dialog=false) { //Embed some JavaScript to show the print dialog or start printing immediately
$param=($dialog ? 'true' : 'false');
$script="print($param);";
$this->IncludeJS($script); } }
$mpdf = new PDF_AutoPrint('', 'Letter', 0, '', 12.7, 12.7, 14, 12.7, 8, 8);
$stylesheet = file_get_contents('eabill.css');
$mpdf->WriteHTML($stylesheet,1);
$mpdf->WriteHTML($message,2);
$mpdf->AutoPrint(true);
$mpdf->Output();

Answer 1

This works for me to print generated PDF file, i used it to print website page contents without menus, banners etc just content with own header and footer
$header = 'Document header';
$html = 'Your document content goes here';
$footer = 'Print date: ' . date('d.m.Y H:i:s') . '<br />Page {PAGENO} of {nb}';
$mpdf = new mPDF('utf-8', 'A4', 0, '', 12, 12, 25, 15, 12, 12);
$mpdf->SetHTMLHeader($header);
$mpdf->SetHTMLFooter($footer);
$mpdf->SetJS('this.print();');
$mpdf->WriteHTML($html);
$mpdf->Output();

Answer 2

Have you tried (snippet):
class PDF_AutoPrint extends PDF_Javascript {
function AutoPrint($dialog=false) {
//Embed some JavaScript to show the print dialog or start printing immediately
if( $dialog ){
$script="this.print();";
$this->IncludeJS($script);
}
}
Credit: Create an Auto-Print PDF
Or, taking the code from the second example in that article:
require('mpdf.php');
class PDF_AutoPrint extends PDF_Javascript {
function AutoPrint( $dialog=false ){
if( $dialog ){
$this->_newobj();
$this->n_js=$this->n;
$this->_out('<<');
# Not sure whether this line is spot on, may need tweaking
$this->_out('/OpenAction '.($this->n+2).' 0 R/Type/Catalog/Pages 1 0 R/PageMode/UseNone/PageLayout/OneColumn');
$this->_out('>>');
$this->_out('endobj');
$this->_newobj();
$this->_out('<<');
$this->_out('/Type/Action/S/Named/N/Print');
$this->_out('>>');
$this->_out('endobj');
}
}
}
$mpdf = new PDF_AutoPrint('', 'Letter', 0, '', 12.7, 12.7, 14, 12.7, 8, 8);
$stylesheet = file_get_contents('eabill.css');
$mpdf->WriteHTML($stylesheet,1);
$mpdf->WriteHTML($message,2);
$mpdf->AutoPrint(true);
$mpdf->Output();

Answer 3

I use DTukans way + added false as a parameter.
Works in FireFox and IE - did not work for chrome :(
$mpdf->SetJS('this.print(false);');

Answer 4

I wrote this as an external file and requested a print via javascript.
post_to_url("pdf.export.php", {htmlForPdf:pdf})
https://stackoverflow.com/a/133997/903454