Last Updated: September 4, 2025
PHP 8.1 introduced significant improvements and new features that enhance code safety, performance, and maintainability.
PHP 8.1 – November 2023
Added: Native
enum types for better type safety in constants.
Added:
readonly properties to enforce immutability on class fields.
Added: External class references in traits using
class keywords for flexibility.
Improved: Union types with more flexible syntax for complex type declarations.
Deprecated: Legacy
__autoload() function in favor of PSR-4 autolooding.
Performance: Faster OPcache preloading and reduced memory overhead for arrays.
Previous Major Versions
| Version | Release Date | Notable Features | |
|---|---|---|---|
| PHP 8.2 | November 2024 | Constructor property promotion for traits, static return type | Details → |
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