PHP Version Migration Service to 8.3+

We migrate existing PHP systems v5.x, v7.x (without frameworks/frameworks, if you want “clean” PHP) to the latest versions 8.3+. We address incompatibilities, optimize performance and strengthen security — with minimal risk and maximum backward compatibility.

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Advantages of PHP 8+

20+ years of PHP experience

Dozens of major migrations: legacy code, high loads, sensitive data.

Without framework — without problems

We work with “clean” PHP, own libraries and minimal dependency on external packages.

Performance

PHP 8 JIT, accelerated kernels, lower latency and smaller resource footprint.

Security

Hardening, stricter types, modern cryptographic practices and code and infrastructure level protections.

What does the service include

Audit & inventory

Scan for deprecations/incompatibilities, dependency map, risk assessment and migration plan by modules.

Patches & refactoring

Replacement of outdated constructions, typing, cleaning dynamic properties, unifying signatures, tests.

Compatibility & tests

Unit/integration/E2E tests, staging environments, regression metrics and monitoring after launch.

Performance

Profiling, OPCache, JIT, caching (APCu/Redis), optimized I/O and database.

Security

CSP, rate limiting, strict headers, protections against XSS/CSRF, secret management, audit logs.

Launch & support

Zero‑downtime deployment, rollback plan, monitoring 24/7, SLA and roadmap for future minor versions.

Key changes from PHP 5/7 to PHP 8+ (language and „structures/types“)

Typing system

Scalar types and return types (PHP 7+), declare(strict_types=1).

Objects instead of resources

curl, gd, socket and others return objects (CurlHandle, GdImage, Socket) instead of resources (8.0).

Strings & arrays

Removed {$str} for index access in string (deprecated 7.4 → removed 8.2).

Syntax & language constructs

Named arguments, attributes, match, nullsafe operator ?-> (8.0).

Errors & exceptions

Throwable and hierarchy from Error/Exception (7+); many „warnings“ now throw TypeError/ValueError (8.0).

Performance

JIT (8.0), faster Zend Engine, optimized hash tables and opcode caching.

We also remove outdated constructions (e.g. __autoload → spl_autoload_register), bring extensions and ini settings to good practices for PHP 8+.

Migration process

  1. 1

    Audit:

    Static analysis, register of deprecations, inventory of extensions/ini.

  2. 2

    Plan & prioritization:

    Breakdown by modules, critical dependencies, fallback strategies.

  3. 3

    Refactoring & tests:

    Patches, typing, automated tests and visual regressions.

  4. 4

    Staging & validation:

    UAT, load, security, monitoring.

  5. 5

    Launch without downtime:

    blue/green or canary deployment, rollback plan.

  6. 6

    Support:

    monitoring 24/7, SLA, roadmap for future minor versions.

What you get

  • Report on status + migration plan
  • Patches/PRs with written changes and tests
  • Configuration guide (php.ini, opcache, JIT)
  • Results from load and CWV measurements