Packing slip PDFs in Laravel

Why packing slips become PDFs

A packing slip is printed and physically placed in a box. It exists to be paper. That is the difference between a document and a view of a database, and it is why warehouse and fulfilment teams keep asking for this.

What a packing slip has to carry

Before any of the code below matters, the template has to produce a document that is actually a packing slip. These are the fields that make it one, and the ones a reader or an auditor will look for first.

• the order reference, which the picker checks against the pick list
• each line with SKU, description and quantity shipped
• backordered lines shown explicitly rather than omitted
• the ship-to address as it will appear on the carton
• the carrier reference or tracking number where it exists

Turning your Blade template into a document

You already have the markup. View("invoices.pdf", $data)->render() gives you it as a string, which is the only input the render needs. asset() and mix()/vite() emit URLs built from APP_URL. If APP_URL is still http://localhost in the environment that renders, every stylesheet and image in the document silently fails to load and you get a plain-text-looking PDF with no error.

The Laravel implementation

the Http facade is the client most projects here already have. The render happens in a controller returning streamDownload, and you return response()->streamDownload, which never holds the file.

<?php
// app/Http/Controllers/PackingSlipController.php

namespace App\Http\Controllers;

use App\Models\PackingSlip;
use Illuminate\Support\Facades\Http;

class PackingSlipController extends Controller
{
    public function pdf(PackingSlip $packing_slip)
    {
        // A Blade view built for print. Do not reuse the on-screen view: it pulls
        // in the app layout and the asset tags, which cannot resolve here.
        $html = view('packing_slips.pdf', ['packing_slip' => $packing_slip])->render();

        $upstream = Http::withToken(config('services.pdfpipe.key'))
            ->timeout(60)
            ->withOptions(['stream' => true])
            ->post('https://api.pdfpipe.xyz/v1/pdf', [
                'html' => $html,
                'options' => ['format' => 'A4', 'printBackground' => true],
            ])
            ->throw();

        return response()->streamDownload(
            fn () => fpassthru($upstream->getBody()->detach()),
            "packing-slip-{$packing_slip->reference}.pdf",
            ['Content-Type' => 'application/pdf'],
        );
    }
}

The CSS that makes a packing slip page correctly

The layout problem specific to this document is that it must print correctly on the label and A5 stock warehouses actually use, not just on A4. These rules handle it.

/* Warehouses print on A5 and label stock, not A4. */
@page {
  size: A5;
  margin: 8mm;
}

.signature {
  break-inside: avoid;
  margin-top: auto;
}

What goes wrong in Laravel

Blade views for PDFs get built by copying the on-screen view, which brings @vite, the app layout and the Livewire scripts with it. Those either fail to resolve or render as visible artefacts. Start the PDF view from an empty file.

What people try first

Most Laravel projects reach for barryvdh/laravel-dompdf, which is convenient because it installs with Composer and needs nothing else, and limiting because dompdf implements its own layout engine with no support for flexbox or grid. That works until it is running on more than one machine, at which point the browser becomes the thing you operate rather than the thing you use.

Where the packing slip lives afterwards

Rendering is the short part. The packing slip is thrown away when the box is opened. It has essentially no retention requirement, which is unusual on this list and worth knowing: the document does not need to be stored, only printed correctly the first time.

Getting the document right

• Check the order reference and quantities, which a picker checks against the physical goods.
• Generation is triggered by an order moving to fulfilment, so size the timeout for that path rather than for a health check.
• Volume arrives in bursts, so queue the render rather than doing it inside the request that triggered it.
• Backgrounds are painted by default here, so a design that uses colour needs nothing set. Only an explicit print_background of false turns them off.

Frequently asked

Related

Other Laravel documents, and the same packing slip in other stacks.