Filling in PDF from web form in PHP - symfony

Question

I have a form which on posting submits data to a controller which should then fill necessary fields and present form to users to physically sign before submitting back.
I used Dhek https://github.com/cchantep/dhek do define the fields on which the form data will be placed and FPDF to generate the final PDF for downloading. I am able to get selected checkboxes marked but no text fields are rendered. Here is what I have tried so far
$json = json_decode(file_get_contents($this->getRequest()->getUriForPath('/bundles/app/form.json')));
$responses = $request->query->all();
$pdfSrcPath = $this->container->getParameter('write_to') . '/bundles/app/Membership_App__form.pdf';
$pdf = new \FPDF_FPDI("P", //L=>Landscape / P=>Portrait
"pt" /* point */ );
$fontSize = 14;
$pagecount = $pdf->setSourceFile($pdfSrcPath);
$testText = "abcdefghijklmnopqrstuvwxyz0123456789";
for ($i = 0; $i < $pagecount; $i++)
{
$pdf->AddPage();
$tplIdx = $pdf->importPage($i + 1);
$pdf->useTemplate($tplIdx, 0, 0, 0, 0, true);
if (isset($json->pages[$i]) && isset($json->pages[$i]->areas))
{
for ($j = 0; $j < count($json->pages[$i]->areas); $j++)
{
$area = $json->pages[$i]->areas[$j];
$x = $area->x;
$y = $area->y;
$w = $area->width;
$h = $area->height;
// Draw blue rect at bounds
$pdf->SetDrawColor(0, 0, 255);
$pdf->SetLineWidth(0.2835);
$pdf->Rect($x, $y, $w, $h);
if ($area->type == "checkbox" && $area->name == $responses['title'])
{
$pdf->SetDrawColor(105, 105, 105);
$pdf->SetLineWidth(2.0);
$pdf->Line($x, $y, $x + $w, $y + $h);
$pdf->Line($x, $y + $h, $x + $w, $y);
}
else if ($area->type == "text")
{
// 'Free' text
$pdf->SetLineWidth(1.0); // border
$iw = $w - 2 /* 2 x 1 */ ;
$v = utf8_decode($responses[$area->name]);
$overflow = ($pdf->GetStringWidth($v) > $iw);
while ($pdf->GetStringWidth($v) > $iw)
{
$v = substr($v, 0, -1);
}
if ($overflow)
{
$v = substr($v, 0, -1) . "\\";
}
$pdf->SetXY($x, $y);
// this line is not rendering
// tried $pdf->Write(intval($h),$v);
// and also tried $pdf->Cell($w, intval($h), $v);
$pdf->MultiCell($w, intval($h), $v, true);
}
}
}
}
$pdf->Output("test-dhek.pdf", "F");