FPDF Header Footer Not Showing

Hello all,
My controller code is:

PHP Code:

namespace App\Controllers;
use App\Libraries\FPDF;

class Test extends BaseController
{

 function Header()
 {
 $this->Image('logo.png',90,15,36);
 $this->SetFont('Arial','B',15);
 $this->Cell(80);
 $this->Cell(30,10,'Title',1,0,'C');
 $this->Ln(20);
 }

 function Footer()
 {
 $this->SetY(-15);
 $this->SetFont('Arial','I',8);
 $this->Cell(0,10,'Page '.$this->PageNo().'/{nb}',0,0,'C');
 }

 public function index()
 {
 $this->pdf = new fpdf();
 $this->pdf->AliasNbPages();
 $this->pdf->AddPage();
 $this->pdf->SetFont('Times','',12);
 $this->pdf->Image('logo.png',90,15,36);
 $this->pdf->Cell(40,60,'Monthly Report');
 $this->response->setHeader("Content-Type", "application/pdf");
 $this->pdf->Output("file.pdf", 'I');
 }
} 


How do you get the header and footer to work? Im on PHP 8.1.10 and CI 4.2.10

Edited the code to: 

PHP Code:

namespace App\Controllers;
use App\Libraries\FPDF;

class TEST extends FPDF
{
 function Header()
 {
 $this->Image('logo.png',10,6,30);
 $this->SetFont('Arial','B',15);
 $this->Cell(55);
 $this->Cell(80,10,'MONTHLY REPORT',1,0,'C');
 $this->Ln(20);
 }

 function Footer()
 {
 $this->SetY(-15);
 $this->SetFont('Arial','I',8);
 $this->Cell(0,10,'Page '.$this->PageNo().'/{nb}',0,0,'C');
 }
}

$test = new TEST();
$test->AliasNbPages();
$test->AddPage();
$test->SetFont('Times','',12);
for($i=1;$i<=40;$i++)
 $test->Cell(0,10,'Printing line number '.$i,0,1);
$test->Output(); 


It's working now.

Please edit your post topic title and add [SOLVED]

Thank you.

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