Upgrade to Laravel 8 safely by confirming PHP 7.3 or higher, auditing your dependencies, writing a handful of characterization tests, then applying the official upgrade guide one major version at a time. Never skip from Laravel 6 straight to 8. The framework’s own upgrade path assumes you are moving sequentially, and skipping versions stacks breaking changes on top of each other in ways that make debugging miserable.
Your immediate next step: run composer show -D to list your direct dependencies before touching composer.json. That single command tells you exactly what needs a compatibility check.
- Small app (under 20 routes, thin test coverage): budget a short amount of time, most of it spent writing quick smoke tests first.
- Large app (enterprise scale, multiple teams, Livewire or heavy frontend builds): budget a significant length of time per major version, with staging verification built into the schedule.
Key Takeaways
A safe Laravel 8 upgrade depends on sequencing PHP first, dependencies second, and characterization tests before any framework code changes.
| Point | Details |
|---|---|
| Confirm PHP 7.3+ first | Laravel 8 requires PHP 7.3 or higher and Composer 2 before you touch composer.json. |
| Never skip major versions | Migrate sequentially through each major release rather than jumping from Laravel 6 to 8 directly. |
| Write characterization tests early | Cover login, payments, and reporting before changing any dependency, not after. |
| Watch factories and route namespaces | Use laravel/legacy-factories as a bridge and fix RouteServiceProvider namespace assumptions. |
| Consider automated dependency mapping | Golden Path Digital’s Laravel Ascend maps package dependencies before applying automated framework upgrades for teams with complex codebases. |
Table of Contents
- Preparing Your Environment for the Laravel 8 Upgrade
- What Commands Do You Run to Upgrade From Laravel 7?
- Common Breaking Changes and How to Fix Them
- How Do You Test and Roll Back a Laravel 8 Upgrade Safely?
- Should You Automate the Laravel 8 Upgrade or Do It by Hand?
- Handling Database Migrations During the Upgrade
- Performance Gains Worth Checking After the Upgrade
- Security Changes That Matter in Laravel 8
- Updating Laravel Mix and Your Frontend Build
- What Most Upgrade Guides Get Wrong
- Golden Path Digital’s Approach to Complex Laravel Upgrades
- Sources
- FAQ
Preparing Your Environment for the Laravel 8 Upgrade
Before you edit a single line, get the ground under you solid. Laravel 8 requires PHP 7.3 or higher and Composer 2, and the upgrade guide lists dependency updates you’ll need for laravel/ui, Guzzle, and PHPUnit. Confirm your server has the required PHP extensions (mbstring, openssl, pdo) before you start, not after a deploy fails.
- Commit or stash all pending changes, then cut a dedicated
upgrade/laravel-8branch off a cleanmain. - Confirm your CI pipeline runs on this branch and that a staging environment is ready to receive it.
- Run
composer show -Dand flag any first-party or third-party package with an open major-version bump. - Write two or three characterization tests around your riskiest workflows if you don’t already have coverage there.
Practitioner writeups on legacy Laravel migrations consistently recommend upgrading PHP first, then the framework, since isolating the two changes makes it obvious which one broke something when a test fails.
Pro Tip: Don’t write a full regression suite before upgrading. Write just enough tests to catch a broken login, a failed checkout, or a bad report, then let the upgrade itself expose everything else.
What Commands Do You Run to Upgrade From Laravel 7?
Once your branch and tests exist, the actual upgrade to Laravel 8 is mostly a Composer conversation followed by careful artisan housekeeping.
- Update
composer.jsonto require"laravel/framework": "^8.0"alongside the matching versions forlaravel/ui,fideloper/proxy(orspatie/laravel-corsif you’ve migrated), and any first-party packages you use. - Run
composer updateand, if a stubborn dependency conflict appears, add--with-all-dependenciesto force a coordinated resolution rather than fighting version constraints one package at a time. - Publish any new config files the framework introduces, and diff them against your existing config rather than overwriting blind.
- Clear every cache layer before you test anything:
php artisan config:clearphp artisan cache:clearphp artisan view:clearphp artisan route:clear
- Run
php artisan migrateon a staging database copy, not production, and watch for any schema assumptions that changed. - Run
php artisan test(or your PHPUnit command) and manually smoke test your critical routes: login, checkout, and any report generation.
If your app relies on Eloquent model factories, Laravel 8 replaced the old class-based factory pattern with a namespaced DatabaseFactories structure. Reviewing the actual file-level diff between 7.x and 8.x on GitHub is faster than reading prose. It shows you exactly which files moved and what changed inside public/index.php and the default seeders.
Common Breaking Changes and How to Fix Them
Three categories of breakage account for most of the friction developers hit moving from Laravel 7 to 8.
Model factories and seeders. Factories now live in database/factories with a namespaced class per model instead of the old closure-based definitions. If rewriting every factory isn’t feasible this sprint, install laravel/legacy-factories as a temporary bridge. It lets old-style factory calls keep working while you migrate them incrementally instead of all at once.
Route namespacing. Laravel 8 removed the automatic AppHttpControllers prefix that route files used to assume. If your RouteServiceProvider still references the old $namespace property, either restore it explicitly or update every route definition to use fully qualified controller class references (Laravel’s newer default).
Abandoned or major-bumped packages. Check Horizon, Passport, Socialite, and Telescope for Laravel 8 compatible releases. For a package that’s genuinely abandoned, don’t try to clone or fork the whole thing. Extract the specific contract your app actually calls and implement that narrow interface yourself, which keeps the fix small and easy to review.
Pro Tip: Grep your codebase for str_ and array_ helper calls before upgrading. Several were deprecated in favor of the Str:: and Arr:: facades, and a project-wide search beats discovering each one via a production error.
How Do You Test and Roll Back a Laravel 8 Upgrade Safely?
Testing before you touch dependencies, not after, is what separates a controlled upgrade from a fire drill. Enterprise modernization guidance is consistent on this point: write characterization tests for your highest-value workflows before changing anything, so you have a behavioral baseline to compare against.
- Write feature tests for login, payment processing, and any report or export feature your business depends on.
- Run a PHPCompatibility scan and
composer auditbefore and after the upgrade to catch both syntax issues and known vulnerabilities. - Deploy to staging with anonymized but realistic data, not empty seed rows that hide edge cases.
- Capture outbound mail with a tool like Mailtrap during staging tests so you catch broken notification templates before customers do.
- Verify queued jobs process correctly. Laravel 8’s queue changes are subtle but can silently stall background workers.
A small set of high-value feature tests protects an upgrade better than a sprawling unit suite with no focus on the paths your business actually depends on. If something breaks in staging, your rollback plan should already be written: revert the composer.lock file, run php artisan migrate:rollback for the specific batch you added, and redeploy the prior release tag. Never discover your rollback steps mid-incident.
Should You Automate the Laravel 8 Upgrade or Do It by Hand?
Automation earns its keep on mechanical, well-tested changes: bulk renaming deprecated helper calls, updating composer.json constraints, or rewriting factory boilerplate across dozens of models. Human review still matters most where behavior, not syntax, is at stake, particularly Livewire components, Tailwind or Vite build configurations, and anything touching payment or authentication logic.
- Codebase size and package count (more packages means more compatibility surface to check).
- Existing test coverage (thin coverage means more manual verification time, regardless of tooling).
- Business-critical workflows that can’t tolerate a regression, even briefly.
- Acceptable downtime window for staging validation and rollback rehearsal.
Golden Path Digital built Laravel Ascend around exactly this tradeoff. It automates the mechanical framework version bumps from Laravel 6 through 11 while mapping package dependencies before any change gets applied, so the automation touches what’s safe to automate and flags what isn’t. For teams weighing manual versus automated Laravel upgrades, the decision usually comes down to whether your test coverage is strong enough to trust a tool with the mechanical parts.
| Factor | Manual upgrade | Automated (Laravel Ascend) |
|---|---|---|
| Best for | Small codebases, thin dependency trees | Enterprise apps with many packages |
| Test coverage needed | Can proceed with partial coverage | Strong coverage accelerates safe automation |
| Time investment | Higher per version | Lower for mechanical changes, review still required |
Handling Database Migrations During the Upgrade
Laravel 8 didn’t overhaul the migration system itself, but schema changes tend to surface during an upgrade precisely because you’re finally running migrations you’d been deferring. Start by running php artisan migrate:status on a staging copy before you touch composer.json, so you have a clean record of what’s already applied and what’s pending.
Watch for two specific risks. First, if your app uses raw SQL in migrations tied to a specific database driver version, confirm that driver’s compatibility with your updated PHP version, since PDO extension behavior occasionally shifts between PHP releases. Second, if you’ve accumulated migrations that were never run in production, this upgrade is the moment they’ll finally execute together, potentially exposing schema conflicts that sat dormant for months.
Never run new migrations directly against production during the upgrade window. Migrate a staging database that’s a real copy of production data first, and watch for foreign key constraint failures or column type mismatches that only appear at scale. If a migration fails midway, Laravel wraps most migrations in a transaction by default (assuming your database driver supports transactional DDL), which limits partial application, but always confirm this behavior for your specific database engine rather than assuming it.
Keep your rollback path realistic: know exactly which migration batch corresponds to the upgrade before you run it, so php artisan migrate:rollback --step=N targets precisely the right changes if something goes wrong.
Performance Gains Worth Checking After the Upgrade
Most of the performance upside from a Laravel 8 upgrade actually comes from the PHP version bump that accompanies it. Moving to PHP 8.x from PHP 7.4 delivers performance gains in the range of 20 to 30 percent in real-world benchmarks, driven largely by JIT compilation and internal engine optimizations. That’s not a Laravel-specific number, but it’s the single biggest lever available to you in this upgrade cycle.
After the upgrade completes, run a few concrete checks rather than assuming the gains materialized automatically. Confirm OPcache is enabled and configured correctly in your production PHP setup, since a misconfigured OPcache can erase most of the PHP 8 speed advantage. Check your route caching is rebuilt with php artisan route:cache, and confirm config caching is active with php artisan config:cache, since stale cached files from the previous version can silently persist and mask real performance.
Review your queue worker memory usage post-upgrade too. Laravel 8’s internal changes to job serialization occasionally shift memory footprints for long-running workers, and it’s worth watching your queue dashboard for a day or two after deploy rather than assuming nothing changed. If you’re running Horizon, confirm it’s on a version compatible with Laravel 8 before you restart your supervisors, since a mismatched Horizon version will fail silently rather than throwing an obvious error.
Security Changes That Matter in Laravel 8
Laravel 8 itself didn’t ship a headline security overhaul, but the upgrade path carries real security weight because of what it forces you to leave behind. Running an unsupported PHP version past its end-of-life window means you stop receiving security patches for the language itself, not just the framework, which raises the stakes well beyond a simple feature gap. The same logic that applies to outdated CMS plugins running past their support window applies here: an unpatched runtime is an open door, regardless of how well-written your application code is.
Dependency updates during the upgrade also close real gaps. Guzzle, PHPUnit, and other first-party dependencies bundled with Laravel 8 include security fixes accumulated since your Laravel 7 install was pinned. Running composer audit before and after the upgrade surfaces any known vulnerabilities sitting in your current lock file, and it takes under a minute to run.
If your app handles authentication, review your Passport or Sanctum configuration specifically during this upgrade window. Token expiration settings and scope definitions occasionally need explicit reconfirmation after a major version bump, even when the underlying package technically remains compatible. Treat the upgrade as a natural checkpoint to confirm your .env secrets haven’t drifted into version control and that your CORS configuration still matches your actual frontend origins, since both are common places where security debt accumulates silently between major upgrades.
Updating Laravel Mix and Your Frontend Build
If your app compiles assets through Laravel Mix, the Laravel 8 upgrade is a reasonable moment to confirm your build pipeline still matches your actual frontend stack. Laravel 8 itself didn’t force a Mix version change, but many teams use this window to move toward Vite, since newer Laravel starter kits have shifted that direction and community support for Mix has thinned accordingly.
Run npm install and npm run dev after your backend upgrade completes, before you assume the frontend is untouched. A stale node_modules directory paired with an updated package.json is a common source of silent build failures that only surface once you deploy.
If your app leans on Livewire alongside Tailwind or a Vite-based build, don’t rely on unit tests alone to confirm the frontend still works. A production-like asset build verification step that actually checks rendered selectors catches breakage that a passing PHPUnit suite will miss entirely, since Livewire’s frontend behavior depends on JavaScript hydration that backend tests can’t see.
Check your webpack.mix.js configuration for any hardcoded paths that assumed the old public directory structure, and rebuild your production assets in a staging environment before your final deploy, not after.
What Most Upgrade Guides Get Wrong
Most Laravel upgrade tutorials read like a changelog: here’s what broke, here’s the fix, move on. That’s useful, but it skips the part that actually determines whether your upgrade goes smoothly, which is how much you invested in tests before you started changing dependencies.
The conventional advice treats testing as a verification step that happens after the upgrade. It should happen before. A handful of characterization tests around your riskiest workflows costs you an afternoon and gives you a behavioral baseline that turns every subsequent step from a guess into a comparison. Skip that step and you’re debugging blind, unable to tell whether a broken checkout page is a Laravel 8 change or something that was already fragile.
The other place conventional wisdom falls short is treating every upgrade the same regardless of codebase size. A ten-route side project and a multi-team enterprise application do not belong on the same checklist, and pretending otherwise is how teams either over-engineer a small upgrade or under-prepare for a large one. Match your process to your actual risk surface, not to a generic template.
— Ty
Golden Path Digital’s Approach to Complex Laravel Upgrades
If your Laravel 8 upgrade involves more than a handful of packages, tight test coverage gaps, or a codebase nobody fully remembers building, Golden Path Digital offers a structured alternative to burning weeks of developer time on trial-and-error dependency resolution. Their approach maps every dependency and its downstream impact before any automated change touches your code, which is the opposite of the “update and see what breaks” pattern that derails so many manual upgrades.
Laravel Ascend automates the mechanical version bumps across Laravel 6 through 11, handling the syntax-level changes that eat developer hours while flagging the behavioral decisions that genuinely need a human. For enterprise teams managing legacy Laravel alongside other aging systems, Golden Path Digital’s broader legacy code modernization framework extends the same dependency-first philosophy across your full technology stack. If your upgrade has stalled because nobody can confidently say what depends on what, request a dependency map and see exactly where your risk actually sits before you commit a sprint to guessing.
Sources
- Upgrade Guide | Laravel 8.x – The clean stack for Artisans and agents
- Migrate Legacy Laravel Apps: 14 Years of Lessons | Richard Joseph Porter
FAQ
What PHP version do I need for Laravel 8?
Laravel 8 requires PHP 7.3 or higher, along with Composer 2, according to the official upgrade guide.
Can I skip Laravel versions and jump straight to 8?
No. Upgrade sequentially through each major version, since skipping versions stacks multiple sets of breaking changes together and makes debugging far harder.
How long does a Laravel 8 upgrade typically take?
A small application with thin test coverage can take half a day, while a large enterprise codebase with heavy dependencies often needs one to two weeks per major version.
What breaks most often when upgrading from Laravel 7 to 8?
Model factories, route namespace assumptions, and third-party package compatibility cause the most friction. Using laravel/legacy-factories as a temporary bridge and reviewing your RouteServiceProvider resolves most factory and routing issues.
Should I automate my Laravel 8 upgrade or do it manually?
Automate mechanical, well-tested changes and keep human review for behavioral logic like Livewire components or payment flows. Golden Path Digital’s Laravel Ascend maps dependencies before applying automated changes for exactly this kind of mixed workload.