extension installed but extension not detected with error PHP Fatal error: Swoole\Client::__construct(): please install the ext-async extension, using Swoole\Async\Client

[apuppy]

extension swoole and swoole_async

the php code

<?php

class TcpDemo
{

    public function launch()
    {
        $client = new Swoole\Client(SWOOLE_SOCK_TCP, SWOOLE_SOCK_ASYNC);
        $client->on("connect", function (Swoole\Client $cli) {
            $cli->send("hello world\n");
        });

        $client->on("receive", function (Swoole\Client $cli, $data) {
            echo "Receive: $data";
            $cli->send(str_repeat('A', 10) . "\n");
        });

        $client->on("error", function (Swoole\Client $cli) {
            echo "error\n";
        });
        $client->on("close", function (Swoole\Client $cli) {
            echo "Connection close\n";
        });
        $client->connect('127.0.0.1', 80);
    }

}

$tcp = new TcpDemo();
$tcp->launch();

run the code then got error

// run
php tcp_client.php
// got fatal error
PHP Fatal error:  Swoole\Client::__construct(): please install the ext-async extension, using Swoole\Async\Client in

extension infomation

➜  download php --ri swoole

swoole

Swoole => enabled
Author => Swoole Team <[email protected]>
Version => 4.4.16
Built => Mar 10 2020 18:52:37
coroutine => enabled
epoll => enabled
eventfd => enabled
signalfd => enabled
cpu_affinity => enabled
spinlock => enabled
rwlock => enabled
pcre => enabled
mutex_timedlock => enabled
pthread_barrier => enabled
futex => enabled
async_redis => enabled

Directive => Local Value => Master Value
swoole.enable_coroutine => On => On
swoole.enable_library => On => On
swoole.enable_preemptive_scheduler => Off => Off
swoole.display_errors => On => On
swoole.use_shortname => On => On
swoole.unixsock_buffer_size => 8388608 => 8388608
➜  download php --ri swoole_async

swoole_async

Swoole => enabled
Author => Swoole Team <[email protected]>
Version => 4.4.16
Built => Mar 11 2020 11:02:27
debug => enabled
trace_log => enabled
mysqlnd => enabled
async_redis => enabled