sort in cakephp / fpdf - php

Question

I have a small script created in CakePHP where I can generate quotes, however the quote items seem to be sorted in a non specific way on my PDF. What is the best way to have this sorted by ID in an ascending order ?
Find below my related code snippet which will list all items on my quote:
foreach ($items as $item) {
$itemSubTotal = $item['quantity'] * $item['unit_price'];
$discount_rate=$item['discount_rate'];
$unit_price=$item['unit_price'];
$subTotal += $itemSubTotal;
$itemDiscount=$itemSubTotal*$discount_rate/100;
$discount+=$itemDiscount;
//$itemTax = $itemSubTotal * ($item['tax_rate'] / 100);
$itemTax = ($itemSubTotal - $itemDiscount) * ($item['tax_rate'] / 100);
$tax += $itemTax;
$itemSubTotal = $itemSubTotal*((100-$discount_rate) / 100);
$itemSubTotal = number_format($itemSubTotal, 2, '.', ',');
$y+=5;
$pdf->setXY(5, $y);
$pdf->MultiCell(10, 5, $i++, 0, 'L');
$pdf->setXY(15, $y);
//$pdf->MultiCell(30, 5, $item['title'], 0, 'L');
$pdf->Cell(30, 5, $item['title'], 0, 2, 'L');
$pdf->setXY(45, $y);
//$pdf->MultiCell(80, 5, $item['details'], 0, 'L');
$pdf->Cell(30, 5, $item['details'], 0, 2, 'L');
$pdf->setXY(125, $y);
$pdf->MultiCell(20, 5, $item['quantity'], 0, 'R');
$pdf->setXY(145, $y);
$pdf->MultiCell(15, 5, number_format($unit_price, 2, '.', ','), 0, 'R');
$pdf->setXY(160, $y);
$pdf->MultiCell(20, 5, number_format($discount_rate, 2, '.', ','), 0, 'R');
$pdf->setXY(180, $y);
$pdf->MultiCell(25, 5, $itemSubTotal, 0, 'R');
}
Some expert help would be greatly appreciated, thank you

Answer 1

I have not tried this, but it should work. Have a look at cake 3 collections and specifically sortBy
If you wrap your $items in a collection, then sort them, then iterate through them you will achieve your goal.
Something like:
use Cake\Collection\Collection;
$collection = new Collection($items);
$sortedByField = $collection->sortBy('field')
If this doesn't work have a play with the other methods like groupBy