mPDF beda Header

public function printpdf($gaji_id)
    {
        ini_set('memory_limit', '-1');
        $gaji_id          = $this->secure->decrypt_url($gaji_id);
        $detail           = $this->db->get_where('v_gaji', array('gaji_id' => $gaji_id))->row();
        $data['detail']   = $this->db->get_where('v_gaji', array('gaji_id' => $gaji_id))->row();
        $data['listData'] = $this->db->order_by('pegawai_nama', 'asc')->get_where('v_detail_gaji', array('gaji_id' => $gaji_id))->result();
        $time             = time();
        $filename         = 'Tanda-Terima-Pembayaran-Gaji-Non-PNS-' . $time;
        $mpdf             = new \Mpdf\Mpdf(['format' => [210, 330], 'tempDir' => '/../../tmp']);
        $mpdf->SetTitle('Tanda Terima Pembayaran Gaji Non PNS');
        $mpdf->SetHTMLHeader('<br>
                <table width="100%" cellpadding="2" cellspacing="2">
                    <tr>
                        <td width="100%" align="center">
                            <div style="font-size:12px;"><b>TANDA TERIMA PEMBAYARAN GAJI NON PNS</b></div>
                            <div style="font-size:12px;"><b>BULAN : ' . strtoupper(getBulan($detail->gaji_bulan)) . ' ' . $detail->gaji_tahun . '</b></div>
                        </td>
                    </tr>
                </table>
                <hr class="s3">');
        $mpdf->AddPage('L', '', '', '', '', 5, 5, 23, 6, 6, 3);
        $mpdf->SetHTMLHeader('<br><br><br>
        <table width="100%" border="1">
        <tr>
            <th width="3%">NO</th>
            <th width="10%">OPD</th>
            <th width="6%">NIPD</th>
            <th width="8%">NIK</th>
            <th>NAMA</th>
            <th width="8%">NO. REK BANK</th>
            <th width="10%">NAMA BANK</th>
            <th width="10%">JABATAN</th>
            <th width="6%">HONOR/GAJI</th>
            <th width="6%">IUR. BPJS 4%</th>
            <th width="6%">IUR. BPJS 1%</th>
            <th width="6%">GAJI DITERIMA</th>
            <th width="10%">TANDA TANGAN</th>
        </tr>
        </table>');
        $html = $this->load->view('print/printgajipdf_v', $data, true);
        $mpdf->WriteHTML($html);
        $pdfFilePath = FCPATH . "download/$filename.pdf";
        $mpdf->Output($pdfFilePath, 'F');
        header("Content-type: application/pdf");
        header("Content-Length:" . filesize($pdfFilePath));
        readfile($pdfFilePath);
        exit;
    }