PHP 8.3 Website Upgrade

I need the code that powers https://pos.twinriversresort.co.ke/webapp/dashboard/ brought fully in line with PHP 8.3. I already have a working staging server where you can carry out the upgrade safely.

The goal is a seamless transition: after the move every feature, page and integration must behave exactly as it does today, only now on the latest PHP version. You will migrate the code to the staging environment, resolve any deprecation notices or fatal errors, and fine-tune configuration changes so nothing breaks. Once I sign off on staging, we will schedule a short production cut-over.

Deliverables
• Updated codebase compatible with PHP 8.3
• All warnings/errors resolved and logged clean
• Functional test report confirming that the dashboard, authentication, data entry, printing and reporting modules work exactly as before
• Deployment assistance to push the upgrade live without downtime

If you have recent experience upgrading Laravel/CodeIgniter or similar MVC PHP apps to 8.x—and know your way around composer, PHPUnit and modern PHP typing—I’d love to get this done quickly.