Custom Page Number in TCPDF - tcpdf

Question

i'm using TCPDF to generate my pdf. I have no idea for reset starting page number. I mean, i will generate report that starting page numer 3 (not 1) in footer, but the second page increment by 2 (3,5,6,7 etc)
Here is my code :
$_SESSION["hal"] = $_POST["hal"];
$_SESSION["f"] = $_POST["f"];
class MYPDF extends TCPDF {
// Page footer
public function Footer() {
// Position at 25 mm from bottom
$this->SetY(-25);
// Set font
$this->SetFont('helvetica', 'b', 8);
// Page number
$this->Cell(0, 15,$_SESSION["f"]." ". $_SESSION["hal"], 'T', false, 'R', 0, '', 0, false, 'T', 'M');
$_SESSION["hal"]++;
}
}
Can someone help please..

Answer 1

Done..
$_SESSION["hal"] = $_POST["hal"];
$_SESSION["f"] = $_POST["f"];
class MYPDF extends TCPDF {
// Page footer
public function Footer() {
// Position at 25 mm from bottom
$this->SetY(-25);
// Set font
$this->SetFont('helvetica', 'b', 8);
// Page number
//i add var to store current page
$halaman = $this->PageNo();
$this->Cell(0, 15,$_SESSION["f"]." ". ($halaman+$_SESSION["hal"]), 'T', false, 'R', 0, '', 0, false, 'T', 'M');
}
}

Answer 2

a other way is to use Page Groups. Better with no need of SESSION.
To start the Group:
$this->startPageGroup();
and to print:
$w_page = isset($this->l['w_page']) ? $this->l['w_page'].' ' : '';
if (empty($this->pagegroups)) {
$pagenumtxt = $w_page.$this->getAliasNumPage().' / '.$this->getAliasNbPages();
} else {
$pagenumtxt = $w_page.$this->getPageNumGroupAlias().' / '.$this->getPageGroupAlias();
$this->Cell(0, 0, $pagenumtxt, 'T', 0, 'L');