I will upgrade legacy PHP 5 or 7 to PHP 8 and fix errors

V
vitalii_lysenko
V
vitalii_lysenko
Vitalii L
upgrade legacy PHP 5 or 7 to PHP 8 and fix errors
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upgrade legacy PHP 5 or 7 to PHP 8 and fix errors

About this gig

Welcome! Are you running an older PHP version (PHP 5.6, 7.0, 7.2, 7.4) and need to upgrade to PHP 8.2 or 8.3? You are in the right place!

I specialize in professional PHP application upgrading, framework migration (Laravel, Symfony, WordPress, custom core), fixing deprecated functions, resolving Fatal Errors, TypeErrors, and securing web applications against vulnerabilities like PHP2Shell.

What I can do for you:- Complete PHP Upgrade (PHP 5.x/7.x to PHP 8.x).- Fixing Deprecations, Warnings, and Fatal Errors.- Code Refactoring & Modernization for strict types and performance.- Security Audit & Patching (Remote Code Execution / PHP2Shell prevention).- Database & Extension compatibility (PDO, MySQLi, OpenSSL, cURL).- Full backup, staging deployment, and zero-downtime production cutover.

Why choose me?- Expert PHP developer with years of debugging and legacy refactoring experience.- Clean, secure, and production-ready code.- Full backup & post-migration support.

Please message me before ordering to discuss your codebase and requirements!

  • Platform

    • Other

  • Website type

    • Business

  • Programming language

    • PHP
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Get to know Vitalii L

Vitalii L

Senior Backend and AI Engineer Python, RAG, FastAPI, Laravel, API

  • FromUkraine
  • Member sinceSep 2026

  • Languages

    English, Ukrainian
Senior Backend & AI Engineer (8+ years). I bridge the gap between Modern AI and Enterprise Web. 🤖 AI & Python: I architect custom RAG microservices, LLM agents, and async systems using Python, FastAPI & pgvector. I build smart Corporate Knowledge Bases that eliminate hallucinations. ⚙️ Enterprise APIs: Deep expertise in PHP/Laravel, building high-load CRMs and complex integrations (Payments, Web3/TRC-20). I design robust, scalable architectures from scratch. Let's build something great!

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