Mpdf: XML declaration not ignored when inlining a SVG image

Created on 23 Aug 2020  路  2Comments  路  Source: mpdf/mpdf

I found this bug

when i include a SVG file into my pdf to create my barcode by using either of the following:

  • $pdfString = $this->mpdf->Output('FilenameIsIgnored', 'S'); (used when i email vouchers)
  • $this->mpdf->Output($pdf_filename, 'I');(used when i want to display voucher on screen)

I get the following result:
voucher

As you can see it adds the following visible text <?xml version="1.0" standalone="no" ?> and it should not be doing this.

Notes

  • I generate the HTML code with the smarty template system and this is where I include the SVG using picquer/php-barcode-generator to add the barcode
  • when i just display the smarty template as a normal page there are no issues with the version text above (not displayed) and the barcode displays correctly
  • I have removed the version text from the smarty template (with regex) and verified it was removed before passing it to mPDF to create a pdf as a string and the version text still appears in the generated pdf.
  • i have tried removing the version text from the pdf string generated by mpdf but I could not get this to work, possibly becasue it is a binary string.
  • i have looked at the pdf in firefox browser, foxit pdf reader and adobe illustrator and they all show the error
  • my github issue - https://github.com/shoulders/qwcrm/issues/1780
  • related issue - https://github.com/mpdf/mpdf/issues/748

This is mPDF and PHP version and environment (server/fpm/cli etc) I am using

  • PHP Version 7.3.12
  • xampp
  • Windows 10
  • mpdf/mpdf v8.0.7

This is a PHP code snippet I use

This is the file order

I will add a cut down version of the code here

<?php

/** print.php **/

// Generate the barcode (as html)
$bc_generator = new Picqer\Barcode\BarcodeGeneratorSVG();
$voucher_barcode = $bc_generator->getBarcode($this->app->components->voucher->getRecord(\CMSApplication::$VAR['voucher_id'], 'voucher_code'), $bc_generator::TYPE_CODE_128);

// Assign barcode to smarty
$this->app->smarty->assign('voucher_barcode',  $voucher_barcode                    );

// Specify what action to do (pdf in browser)
$this->app->system->communication->performAction(\CMSApplication::$VAR['commType'], $templateFile, null, $filename ?? null, $client_details ?? null, $emailSubject ?? null, $emailBody ?? null);

/** Communication.php **/

// fetch the smarty template as a string
$this->templatePayload = $this->app->smarty->fetch($templateFile); 

/** Pdf.php **/

// Send the template as a pdf to the browser
$this->app->system->pdf->mpdfOutputBrowser($this->filename.'.pdf', $this->templatePayload);

This is a HTML/CSS code snippet I use

````html

{barcode}
```` This is the full html template I use (**$templateFile**) ````html " QWCRM - Voucher
My Name
 
Purchased by
my name
£100.00
 
XOL37C9HVBXEQAJY 
            XOL37C9HVBXEQAJY<br>
            <strong>Valid Until 2021-02-26</strong>
        </td>
    </tr>
</table>


"
````

Thanks for any help

shoulders

SVG bufix
Source
picture shoulders

All 2 comments

You need to include the resulting html that you are trying to convert, preferably the minimum required to reproduce the issue.

ssieb picture ssieb on 23 Aug 2020
👍1

This is a bug, mPDF should ignore the xml declaration.

Currently, until fixed, you have a few options:

finwe picture finwe on 24 Aug 2020
👍1
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