查看 swoole 版本
php --ri swoole
显示：
swoole
Swoole => enabled
Author => Swoole Team <team@swoole.com>
Version => 4.4.12
Built => Dec 10 2019 17:09:41
coroutine => enabled
epoll => enabled
eventfd => enabled
signalfd => enabled
cpu_affinity => enabled
spinlock => enabled
rwlock => enabled
http2 => enabled
pcre => enabled
zlib => 1.2.7
mutex_timedlock => enabled
pthread_barrier => enabled
futex => enabled
async_redis => enabled
Directive => Local Value => Master Value
swoole.display_errors => On => On
swoole.enable_coroutine => On => On
swoole.enable_library => On => On
swoole.enable_preemptive_scheduler => Off => Off
swoole.unixsock_buffer_size => 8388608 => 8388608
swoole.use_shortname => On => On