PHP 8.5 is the active development branch for the upcoming PHP release, scheduled for 2025 November.
PHP 8.4 is a feature-rich PHP version that brings support for property hooks, asymmetric visibility support in classes, database driver-specific PDO classes, Lazy objects, a HTML5 support in the DOM extension, along with several new features, improvements, and deprecations.
PHP 8.3 is the latest stable PHP version, bringing typed class constants, Granular DateTime Exceptions, fallback value support for PHP INI Environment Variable syntax, and more.
PHP 8.2 is the latest PHP version which brings readonly classes, DNF types, null, false, and true types, sensitive parameter redaction support, a new random extension, and several new features along with a few deprecations.
PHP 8.1, released in 2021, brings major new features such as Enums, Fibers, never return type, Intersection Types, readonly properties, and more, while ironing out some of its undesired legacy features by deprecating them.