public static function renderAnswer($answer)
 {
     require_once Yii::getPathOfAlias('application.vendor') . '/tcpdf/tcpdf.php';
     // create new PDF document
     $pdf = new TCPDF(PDF_PAGE_ORIENTATION, PDF_UNIT, PDF_PAGE_FORMAT, true, 'UTF-8', false);
     $pdf->setPDFVersion('1.7');
     // set document information
     $pdf->SetCreator(PDF_CREATOR);
     $pdf->SetAuthor('Biobanques');
     $pdf->SetTitle($answer->name);
     $pdf->SetSubject($answer->name);
     $pdf->SetKeywords('Biobanques, PDF, cbsd, platform' . $answer->name);
     // set default header data
     $pdf->SetHeaderData(PDF_HEADER_LOGO, PDF_HEADER_LOGO_WIDTH, PDF_HEADER_TITLE, PDF_HEADER_STRING);
     // set header and footer fonts
     $pdf->setHeaderFont(array(PDF_FONT_NAME_MAIN, '', PDF_FONT_SIZE_MAIN));
     $pdf->setFooterFont(array(PDF_FONT_NAME_DATA, '', PDF_FONT_SIZE_DATA));
     // set default monospaced font
     $pdf->SetDefaultMonospacedFont(PDF_FONT_MONOSPACED);
     // set margins
     $pdf->SetMargins(PDF_MARGIN_LEFT, PDF_MARGIN_TOP, PDF_MARGIN_RIGHT);
     $pdf->SetHeaderMargin(PDF_MARGIN_HEADER);
     $pdf->SetFooterMargin(PDF_MARGIN_FOOTER);
     // set auto page breaks
     $pdf->SetAutoPageBreak(true, PDF_MARGIN_BOTTOM);
     // set image scale factor
     $pdf->setImageScale(PDF_IMAGE_SCALE_RATIO);
     // set some language-dependent strings (optional)
     /* if (@file_exists(dirname(__FILE__) . '/lang/eng.php')) {
        require_once(dirname(__FILE__) . '/lang/eng.php');
        $pdf->setLanguageArray($l);
        } */
     // ---------------------------------------------------------
     // IMPORTANT: disable font subsetting to allow users editing the document
     $pdf->setFontSubsetting(false);
     // set font
     $pdf->SetFont('helvetica', '', 8, '', false);
     // add a page
     $pdf->AddPage();
     //form default properties
     $pdf->setFormDefaultProp(array('lineWidth' => 1, 'borderStyle' => 'solid', 'fillColor' => "lightGray", 'strokeColor' => "gray"));
     $pdf->SetFont('helvetica', 'B', 18);
     $pdf->Cell(0, 5, 'Biobanques CBSDPlatform ', 0, 1, 'C');
     $pdf->Ln(10);
     $pdf->Cell(0, 5, $answer->name, 0, 1, 'C');
     $pdf->Ln(10);
     $pdf->Cell(0, 5, "-", 0, 1, 'C');
     $pdf->Ln(10);
     $pdf->Cell(0, 5, $answer->name, 0, 1, 'C');
     $pdf->Ln(30);
     $pdf->SetFont('helvetica', 'N', 12);
     $dd = $answer->last_modified['date'];
     //mongo date
     $html = '<span>' . "<b>Description :</b> " . $answer->description . '<br /><b>Dernière modification : </b>' . date("d/m/Y H:i", strtotime($dd)) . '</span>';
     $pdf->writeHTMLCell(0, 0, '', '', $html, 1, 1, false, true, '', false);
     $pdf->Ln(10);
     $pdf = AnswerPDFRenderer::renderAnsweredPDF($pdf, $answer, "fr");
     // reset pointer to the last page
     $pdf->lastPage();
     // ---------------------------------------------------------
     //Close and output PDF document
     $pdf->Output('biobanques_cbsdplatform_' . $answer->id . '.pdf', 'D');
 }