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Version: v6



This filter is run after the PDF template's HTML is loaded into mPDF and right before the document is generated.


$mpdf | object

  • The initialised mPDF class that handles the PDF generation

$form | array

  • The current Gravity Forms array

$entry | array

  • The raw Gravity Forms Entry array.

$settings | array

  • The current PDF settings being processed

$Helper_PDF | object

  • The initialised \GFPDF\Helper\Helper_PDF class


The snippet below will output additional debugging information to the end of the PDF when WordPress has debugging mode enabled:

add_filter( 'gfpdf_mpdf_class', function( $mpdf, $form, $entry, $settings, $Helper_PDF ) {

/* You might want to include additional debugging information if WP_DEBUG is true */
if( defined( 'WP_DEBUG' ) && true === WP_DEBUG ) {
$mpdf->WriteHTML( 'Debug Information: ...' );

return $mpdf;

}, 10, 5 );

You might also like to change the display mode from the 'fullpage' setting we default to:

add_filter( 'gfpdf_mpdf_class', function( $mpdf, $form, $entry, $settings, $Helper_PDF ) {

* Let's change the PDF display mode from fullpage to fullwidth
* We could have called $mpdf->SetDisplayMode( 'fullwidth', 'continuous' ); directly, but since we have a public
* method available in $Helper_PDF that does just that we'll use it instead.
$Helper_PDF->set_display_mode( 'fullwidth' );

return $mpdf;

}, 10, 5 );

Source Code

This filter is located in the Helper_PDF::generate() method of /src/helper/Helper_PDF.php.