openswoole: 26.2.0

2026-02-28T00:00:00+00:00

. PHP 8.5 support
. PHP native Fiber context backend for coroutines: new coroutine context backend using PHP's native zend_fiber API instead of Boost ASM or ucontext. Enables proper integration with xdebug, profilers, and fiber-aware extensions. Configurable at runtime via `Co::set(['use_fiber_context' => true])` or INI `openswoole.use_fiber_context=On`
. Xdebug support: xdebug step debugging now works correctly inside coroutines when fiber context is enabled. Removed the legacy "extremely dangerous" warning
. Runtime reactor type selection: select the event reactor backend at runtime via `Co::set(['reactor_type' => OPENSWOOLE_IO_URING])`. New constants: OPENSWOOLE_EPOLL, OPENSWOOLE_KQUEUE, OPENSWOOLE_POLL, OPENSWOOLE_SELECT, OPENSWOOLE_IO_URING
. io_uring reactor backend: new event reactor using Linux io_uring with IORING_OP_POLL_ADD as a drop-in replacement for epoll. Enable with `--enable-io-uring` (requires liburing). Supports multishot poll on kernel 5.13+ with automatic fallback on older kernels
. io_uring async file I/O engine: dedicated io_uring ring for asynchronous file operations (open, read, write, fstat, fsync, unlink, rename, mkdir, rmdir), replacing the thread pool. Unsupported operations gracefully fall back to the thread pool
. Event loop lag metrics: real-time event loop lag monitoring via `$server->stats()`. Exposes `event_loop_lag_ms`, `event_loop_lag_max_ms`, and `event_loop_lag_avg_ms` per worker, task worker (when coroutine-enabled), and reactor thread (process mode). Useful for detecting blocking operations that stall the event loop
. Coroutine-safe exit() support: intercepts exit() calls inside coroutines on PHP 8.4+ (where exit changed from opcode to function) and throws openswoole_exit_exception instead
. Backward compatibility constant aliases
. Migrate HTTP parser to llhttp: replaces the custom openswoole_http_parser with llhttp parser for improved standards compliance and performance
. Fix reflection issues and scope leaks (#284): OSW_FUNCTION_ALIAS caused global functions to appear as class methods with corrupted return types in Reflection. Replaced with proper PHP_FE/PHP_FALIAS entries
. Fix file I/O hanging under io_uring: race condition where eventfd notification could be lost between draining and re-arming single-shot POLL_ADD. Added reactor end-of-loop callback and timeout CQE filtering
. Fix file lock bug: non-blocking flock (LOCK_NB) now properly checks in-process coroutine lock state before the system flock() call
. Fix CPU affinity compile check: add missing _GNU_SOURCE define before sched.h
. Fix futex compile check: add missing _GNU_SOURCE define before linux/futex.h
. Namespace normalization: openswoole_*, updated internal references and test directories
. Removed compile-time guards from reactor type PHP constants; runtime validation handles unsupported backends
. Removed PHP 8.0 compatibility code
. Dropped PHP 8.2 support
. Fix postgres client bugs @mrVrAlex