PHP 3 to Laravel 12:
Anatomy of a Rescue Mission

The codebase was a museum of early 2000s web development. Raw SQL queries in the view files, global variables everywhere, and a server running a PHP version so old it belonged in a history book.

For this client, a major logistics provider, this system wasn't just old; it was the backbone of their operations. A failure meant trucks stopped moving. This wasn't just a rewrite; it was Rescue Engineering.

Stabilizing the "Patient"

Before we touch a single line of code, we stabilize the environment. Legacy systems often fail because they rely on specific, outdated OS configurations that are impossible to replicate on modern hardware. By "containerizing" the monolith with Docker, we create a safe, reproducible environment that can run alongside modern cloud infrastructure.

Building the Laravel Bridge

The biggest hurdle in a long-term rescue is keeping the user experience seamless. We implemented a "shared session" architecture. When a user logged into the old PHP 3 system, the modern Laravel 12 application knew exactly who they were via a shared Redis session store.

This allowed us to rewrite the Dashboard in Laravel while the Reporting engine was still running on the old code. To the end-user, it looked like one unified, modernized system.

The "Big Bang" Myth

In rescue engineering, the "Big Bang" (switching off the old and switching on the new) is almost always a mistake. It introduces unacceptable risk. Instead, we used a Reverse Proxy (Nginx) to route traffic. If a feature had been modernized, Laravel handled it. If not, the request was passed through to the legacy server silently.

The Result: Technical Freedom

After 12 months, the legacy server was finally decommissioned. The logistics provider now has a codebase that is testable, scalable, and; most importantly; secured a long-term, reliable partner to ensure their operations run smoothly for the next decade.