We build, maintain and modernise custom PHP web applications for legacy systems, regulated environments and businesses with bespoke logic no CMS can handle.
01 / A better starting point
Is Your Custom PHP Development Costing You Customers Every Day?
Most businesses lose customers every day to underperforming custom PHP development. If any of these sound familiar, you are losing revenue right now:
02 / Built around your ambition
Our custom PHP web application development services — 7 Real Solutions
- 01
Custom PHP 8 application development
We build new PHP 8 applications with typed code, clear structure, Composer packages and automated tests, so bespoke systems stay fast, secure and easy for other developers to maintain.
- 02
Legacy PHP modernisation (PHP 5/7 → PHP 8)
We upgrade PHP 5 and 7 codebases to PHP 8 in controlled stages, fixing deprecated functions, adding tests around critical paths and keeping the system running throughout.
- 03
Custom business logic implementation
We turn your pricing rules, approval workflows, calculations and integrations into well-structured, tested code, documented so your team understands exactly how each rule behaves.
- 04
PHP to Laravel migration
We migrate custom PHP to Laravel feature by feature behind feature flags, so the legacy system keeps serving customers while each part moves to the new framework.
- 05
Security audits and OWASP compliance
We audit code and dependencies against the OWASP Top 10, then fix injection risks, CSRF and XSS gaps, weak authentication and outdated packages we find.
- 06
Performance tuning and database optimisation
We profile slow requests, rewrite heavy queries, add indexes and introduce caching where it helps, so pages respond faster and your servers handle more traffic.
- 07
Composer dependency management and CI/CD
We bring dependencies under Composer, pin versions and set up CI/CD pipelines that run tests and security checks on every change before it reaches production.
The Payoff
What Our Custom PHP Development Does for Your Business
A supported PHP version
Moving from PHP 5 or 7 to PHP 8 keeps you on security updates and unlocks better performance.
Fewer security gaps
Dependencies are brought under Composer, patched and checked against OWASP guidance.
Faster requests and queries
Profiling finds slow queries and heavy code paths, and we fix them at the source.
Freedom to extend
Modular code lets you add features without risking the flows your business depends on.
How we work / From idea to impact
How We Approach Custom PHP Projects
- 01
Code and infrastructure audit
We read the codebase, check PHP and dependency versions, and map the critical flows before touching anything.
- 02
Safety net first
Characterisation tests and error monitoring go in early so we can change code without breaking behaviour.
- 03
Modernisation plan
You get a clear choice between upgrading in place, refactoring gradually or migrating to Laravel, with trade-offs explained.
- 04
Incremental refactor and build
Work ships in small, reviewed steps through a CI pipeline, so the live system keeps running throughout.
- 05
Performance and security pass
We tune the database, add caching where it helps and close any remaining vulnerabilities.
- 06
Handover and support
Documentation and a walkthrough leave your team able to maintain the system, with support available if you want it.
Why Devintek
Why Choose Devintek for Custom PHP Development
Comfortable working inside old, undocumented PHP code
Tests added before refactoring, not after
Practical advice on custom PHP versus moving to Laravel
Composer, PSR standards and static analysis on every project
Upgrades delivered without taking the live system offline
Security reviews grounded in OWASP guidance
Your vision. Our craft.
Strategy, design and development working as one connected team.
Selected Work / Devintek
Case Studies
A closer look at the ideas, craft and collaboration behind our work.
Industries
Industries Relying on Our Custom PHP Development
- Logistics and distribution
- Insurance brokers
- Manufacturing
- Online marketplaces
- Booking and ticketing
- Local government suppliers
- Wholesale trade
Investment
Custom PHP Development Packages From Build to Modernisation
Small PHP Application
From USD 25K
- Custom PHP 8 build for focused business logic
- Composer dependencies and automated tests
- Security review before launch
Medium SaaS-Adjacent Build
From USD 80K
- Larger custom PHP application
- Performance tuning and database optimisation
- CI/CD pipelines and documentation
- Option to phase towards Laravel
Legacy Modernisation
From USD 250K
- Audit and security pass on existing code
- Phased PHP 5/7 to PHP 8 or Laravel migration
- Feature flags so the legacy system keeps running
FAQ
Frequently Asked Questions
Still have questions?
Our team replies within one business day with a straight answer, not a sales pitch.
Contact usCustom PHP Web Application Development Services for Growing Businesses
Custom PHP web application development services occupy a specialist niche in 2026: legacy maintenance, regulated industries, niche business logic, and any greenfield project where a small audited codebase is preferable to a framework's hundred-package footprint. We work with custom PHP every week — both in legacy modernisation engagements where clients inherit a 10-year-old profitable application that needs stabilising, and in greenfield projects where the requirements are specific enough to make Laravel overkill. Every custom PHP engagement starts with an audit. We document the architecture, scan dependencies for vulnerabilities, identify the highest-risk modules, and write a stabilisation plan before any feature work begins. From there we modernise PHP versions where appropriate (PHP 5/7 → PHP 8.x), add automated test coverage on critical paths, set up CI/CD pipelines (GitHub Actions or GitLab CI), and harden security against OWASP Top 10 risks. Most legacy PHP modernisation engagements run 6–18 months in phases — we never recommend big-bang rewrites because they almost always destroy value. If your business is approaching the end of life on a custom PHP application, or if you have inherited one from a departing engineer, book a discovery call. We will audit the codebase, give you a written stabilisation plan, and tell you honestly whether modernising in place or migrating to Laravel is the smarter move.
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Ready to Grow With Custom PHP Development?
Let's discuss your goals on a free 30-minute strategy call. You will leave with a written roadmap — whether you hire us or not.
Strategy / Design / Technology