如图所示

vagrant@vagrant-ubuntu-trusty-64:~$ php server.php 
$http = new swoole_http_server("0.0.0.0", 9501);

$http->on('request', function ($request, $response) {
    var_dump($request->get, $request->post);
    $response->header("Content-Type", "text/html; charset=utf-8");
    $response->end("
Hello Swoole. #".rand(1000, 9999)."
");
});

$http->start();
vagrant@vagrant-ubuntu-trusty-64:~$ 

---

phpinfo()

swoole support enabled
Version 1.7.19
Author tianfeng.han[email: mikan.tenny@gmail.com]
epoll enabled
eventfd enabled
timerfd enabled
signalfd enabled
cpu affinity enabled
spinlock enabled
rwlock enabled
Linux Native AIO enabled
Gcc AIO enabled
pcre enabled
zlib enabled
mutex_timedlock enabled
pthread_barrier enabled

---

php -i

vagrant@vagrant-ubuntu-trusty-64:~$ php -i |grep swoole
vagrant@vagrant-ubuntu-trusty-64:~$

回复内容：

如图所示

vagrant@vagrant-ubuntu-trusty-64:~$ php server.php 
$http = new swoole_http_server("0.0.0.0", 9501);

$http->on('request', function ($request, $response) {
    var_dump($request->get, $request->post);
    $response->header("Content-Type", "text/html; charset=utf-8");
    $response->end("
Hello Swoole. #".rand(1000, 9999)."
");
});

$http->start();
vagrant@vagrant-ubuntu-trusty-64:~$ 

---

phpinfo()

swoole support enabled
Version 1.7.19
Author tianfeng.han[email: mikan.tenny@gmail.com]
epoll enabled
eventfd enabled
timerfd enabled
signalfd enabled
cpu affinity enabled
spinlock enabled
rwlock enabled
Linux Native AIO enabled
Gcc AIO enabled
pcre enabled
zlib enabled
mutex_timedlock enabled
pthread_barrier enabled

---

php -i

vagrant@vagrant-ubuntu-trusty-64:~$ php -i |grep swoole
vagrant@vagrant-ubuntu-trusty-64:~$

1,php -i | grep ini ,找到配置文件，
2,查看ini配置文件地址
3,检查 extension=swoole.so 是否配置
4,php -m | grep swoole