Fixed (incompatible changes to be noted)

• Fixed a problem with Redis subscribe API design issues that caused duplicate subscriptions and subscription messages to be lost (see: Subscription Mode Documentation) (#2305) (@windrunner414)
• After using coroutine, you can no longer use the traditional connection multiplexing method such as pconnect, otherwise it will generate the problem of multi-coroutine handle the same Socket at the same time (7b1e786) (@shiguangqi)

Enhancement

• Coroutine client re-supports full duplex (#2350) (@twosee)
• Support for secure cross-coroutine socket close (#2327) (@twosee)
• RFC-1015: Non-Worker Process Allows One-Way Delivery Task (222043a) (@matyhtf)
• swoole_strerror supports automatic convert system error code and Swoole error code to text, no need to specify parameters (c92f444) (@twosee)
• GDB trace tool supports viewing timer and reactor and hashmap information (2beb563) (@shiguangqi)
• When MOVED and ASK errors occurred when using Redis cluster, it will be automatically transferred to the corresponding server (#2299) (@windrunner414)
• Underlying code optimization, reducing memory copy when receiving packages (@matyhtf)
• Now calling Co\Socket->close() will immediately close the fd instead of waiting for the object to be destructed, after closed, use any other API will return a BADF error (consistent with the system API) (7a61963) (@twosee)
• Some illegal parameters no longer cause fatal errors but generate a warning, because external parameters are sometimes uncontrollable and there is a certain risk (cd432d3) (@twosee)
• API compatibility enhancement after use coroutine mode (consistent with sync mode) (36687e8) (@matyhtf)
• Now swoole\src can be used as a C\C++ library at the same time (libswoole)

Fixed

• Fixed a possible coredump problem when there were a large number of objects before the extension load (4ddeedb) (@twosee)
• Fixed coredump caused by attempting to clear the uninitialized DNS cache (#2288) (@mabu233)
• When task_enable_coroutine is enabled, incorrectly calling Server->finish will trigger a fatal error (156ede6) (@twosee)
• The php.ini configuration now displays On and Off correctly (instead of 0 and 1) (fe25982) (@twosee)
• Fixed the Co::getaddrinfo parameter parser bug (#2273) (@mabu233)
• Fixed fd error when using dispatch_func in UDP mode (#2306) (@mabu233)
• Fixed the bug that dispatch_func does not work when specifying the function name, optimization for reducing memory copy (2bc49e4) (@twosee)
• PHP warnings will no longer be triggered when the task expires (but the underlying log warning of swoole) (54eee5e) (@matyhtf)
• Fixed enable coroutine states after process restarts (#2310)
• Fixed the user process id property (#2313) (@junwei-qu)
• Fixed the bug caused by incorrectly using the asynchronous API in the onStart callback in BASE mode (#2308) (@matyhtf)
• Fixed incorrect manager_id in BASE mode (e18e013) (@matyhtf)
• Fixed mmap using SEEK_END offset error (#2314) (@junwei-qu)
• Fixed getSocket memory leak (ec8c4b2) (@twosee)
• Optimized stream mode (47e0e9e) (@matyhtf)
• Fixed BUG caused by connection multiplexing in sync client with KEEP mode under certain conditions (4c5728b) (@matyhtf)
• Fixed an issue with Atomic multiple wait and wakeup overflows on MacOS (fbccb25) (@twosee)
• Fixed the problem of opening the static_handler directory traversal attack risk, this is a convenient debugging feature, please do not use for production (#2323) (@windrunner414)
• Fixed unchecked return value of futex_wait system call (#2351) (@junwei-qu)
• Fixed bugs in Redis::ZAdd API parsing parameters, and fix other potential type conversion problems (#2321) (21e0497) (a0e612f) (00134cf) (f5a331e) (5f87f17) (a15f094) (67f3285) (808f578) (d118fe3) (5294473) (48f6790) (0105c7f) (ba6c8b4) (@matyhtf)
• Fixed a third-party hook failure that could result from not using function pointers when sending data (89ba2da) (@matyhtf)
• Fixed a memory leak in the Timer::tick method when passing arguments (7e15141) (@mabu233)
• Fixed user process does not exit automatically (2901ce0) (@matyhtf)
• Fixed read operation timeout config (a990540) (@shiguangqi)
• Fixed the problem that the parameter timeout time does not take effect after the Co\Client open the package length check (#2346) (@twosee)
• Server is no longer in the control of buffer_output_size in BASE mode, only limited by socket_buffer_size (#2326) (@matyhtf)
• Fixed compilation error under FREEBSD (#2325) (@matyhtf)
• Compatibility: When the Mysql escape method fails, it will return an empty string instead of FALSE

Others

• Swoole\Serialize is now supported for PHP73, but it is still marked as a deprecated feature