PHP 8.2
PHP 8.2 is a release of the PHP language shipped in December 2022, continuing the 8.x series and refining the mechanisms introduced in PHP 8.1. It focused on further polishing the type system and tidying up the language by marking outdated constructs as deprecated.
Why PHP 8.2 mattered
PHP 8.2 introduced changes that improve data modelling and make code more predictable:
- readonly classes — the ability to mark an entire class as immutable, without repeating the modifier on each field;
- composite types (DNF) — combining union and intersection types, for example indicating that a value satisfies several interfaces or is null;
- standalone null, true and false types — more precise return-type declarations;
- deprecation of dynamic properties — encouraging explicit field definitions, which reduces hard-to-spot bugs.
Deprecating dynamic properties was an important signal of the language's direction toward greater type discipline and predictable object behaviour.
Practical applications
PHP 8.2 became a solid production base for modern web applications, online stores and SaaS platforms. Thanks to its long window of security support, it is a popular choice for new deployments built on current frameworks. Migrating from PHP 8.1 usually goes smoothly, because the two versions are highly compatible. Modern hosting and VPS servers let you choose the PHP version from a control panel, so you can conveniently test an application on 8.2 before switching the production environment.
A move toward immutability
The introduction of readonly classes fits well into a broader trend visible across successive PHP releases: a growing emphasis on immutability and predictable data. Objects whose state cannot be changed after creation are easier to reason about and safer in concurrent environments. Combined with the deprecation of dynamic properties, PHP 8.2 clearly encourages developers to define the structure of their objects explicitly and with discipline.