fpdf为什么要为每个单元格创建一个新页面？

I am trying to create an invoice with fpdf and if it reaches the bottom I want the content to go forward on the next page. So for example I used this code to print lines to go on to the next page.

$y = 150;
for($i = 0;$i < 50;$i++) {
$pdf->setXY(150,$y);
$pdf->SetFont('Arial','B',10);
$pdf->Cell(10,10,'Inclusief BTW: ');
$y += 5;
}

Here it it will go down fine as I expect. But on the second page it shows once. Also 23 pages are created for every cell 1 page is used and I want it to continue on the second page the same way it does for the first page.

Full code:

<?php
require('fpdf.php');
test();
function test() {
  $pdf = new FPDF();
  $pdf->addPage();
    $y = 5;
    $pdf->SetFont('Arial','I',10);

    for($i = 0;$i < 150;$i++) {
      $pdf->setXY(10,$y);
      $pdf->Cell(10,10,"Inclusief BTW",0,1);
    $y += 5;

    }
  $pdf->output();
}
?>

Try with the following code:

$pdf->setXY(10,$y);
for($i = 0;$i < 150;$i++) {
    $pdf->Cell(5, 5, "Inclusief BTW", 0, 1);
}