gistfile1.php

<?php

function pre_render_pdf($mpdf, $form_id, $lead_id, $arguments, $output, $filename) {
    // XXX: We have multiple notifications setup which means this function is
    // called multiple times and we end up appending the document many times. This
    // will help us get around that by ensuring it's only called once.
    static $has_been_called = false;
    if($has_been_called) return $mpdf;

    // XXX: We're only interested in the form with ID=1
    if ($form_id != 1) return $mpdf;

    $form = RGFormsModel::get_form_meta($form_id);
    $fileupload_fields = GFCommon::get_fields_by_type($form, array('fileupload'));

    if (!is_array($fileupload_fields)) return $mpdf;

    $entry = GFFormsModel::get_lead($lead_id);

    $upload_root = RGFormsModel::get_upload_root();

    // XXX: We're assuming that there's only one file upload field.
    $field = $fileupload_fields[0];

    $url = $entry[$field['id']];
    $file = preg_replace('|^(.*?)/gravity_forms/|', $upload_root, $url);

    $mpdf->SetImportUse();
    $pagecount = $mpdf->SetSourceFile($file);
    for ($i=1; $i<=$pagecount; $i++) {
        if ($i < $pagecount)
            $mpdf->AddPage();

        $import_page = $mpdf->ImportPage($i);
        $mpdf->UseTemplate($import_page);
    }

    $has_been_called = true;

    return $mpdf;
}
add_filter('gfpdfe_pre_render_pdf', 'pre_render_pdf', 10, 6);