fpdf - going back to the previous page

Question

I am generating pdf invoice using fpdf.

Some invoices containing many items, and details need to go into the second page. However, I need the total, and other details

Answer 1

if(!empty($this->replace) && !empty($this->replacement)){
    $this->pages[$n]=str_replace($this->replace,$this->replacement,$this->pages[$n]);
}

I added this code to the fpdf class in _putpages() right under /Page content line 2851

Example after adding above to code:

$pdf->replace = array("{paid_msg}","{balance}");
$pdf->replacement = array("Paid","0.00");

It can be a string or an array.