php获取客户端socket,如何识别客户端PHP Socket？

如果您考虑TCP或UDP数据包标头中提供的内容，则不会包含太多身份信息，只包括IP地址。如果您想知道客户的身份，您需要让他们发送某种独特的标识符(例如@madara评论的用户名和密码)。如果它们来自相同的IP，这意味着它们使用相同的路由器，在这种情况下，其目的是掩盖路由器后面的设备。

要检测谁断开连接，首先需要确定谁连接。每个连接都有自己的套接字，即使它们来自同一个IP地址。在psuedo php中：

// Store all active sockets in an array

$online_users = array();

// Open up a listening socket

$listener = socket_create(...);

socket_listen($listener);

$client_sock = socket_accept($listener);

// Have the client send authentication stuff after connecting and

// we'll receive it on the server side

$username = socket_read($client_sock, $len);

// Map the username to the client socket

$online_users[$username] = $client_sock;

// Continue to read or write data to/from the sockets. When a read or

// write fails, you just iterate through the array to find out who

// it was. If the socket $failed_sock failed, do as follows

foreach ($online_users as $name => $socket)

{

if ($socket == $failed_sock)

{

// $name is the username of the client that disconnected

echo $name . ' disconnected';

// You can then broadcast to your other clients that $name

// disconnected. You can also do your SQL query to update the

// db here.

// Finally remove the entry for the disconnected client

unset($online_users[$name]);

}

}