stream_socket_accept()

(PHP 5, PHP 7)

接受由stream_socket_server()創建的套接字連接

說明stream_socket_accept(resource$server_socket[,float$timeout= ini_get("default_socket_timeout")[,string&$peername]]):resource

接受由stream_socket_server()創建的套接字連接。

參數$server_socket需要接受的服務器創建的套接字連接。$timeout覆蓋默認的套接字接受的超時時限。輸入的時間需以秒為單位。$peername如果包含該參數并且是可以從選中的傳輸數據中獲取到，則將被設置給連接中的客戶端主機的名稱(地址)(怕出入很大，附帶上原文：Will be set to the name (address) of the client which connected, if included and available from the selected transport.)Note:

也可以之后通過stream_socket_get_name()來確定。

返回值

返回接受套接之后的資源流或者在失敗時返回FALSE。

注釋Warning

該函數不能被用于 UDP 套接字?？梢允褂胹tream_socket_recvfrom()和stream_socket_sendto()來取而代之。

參見cURL 函數This code could be very helpfull...

The following code is for the "server". It listen for a message until CTRL-C

while (true)

{

// disconnected every 5 seconds...

receive_message('127.0.0.1','85',5);

}

function receive_message($ipServer,$portNumber,$nbSecondsIdle)

{

// creating the socket...

$socket = stream_socket_server('tcp://'.$ipServer.':'.$portNumber, $errno, $errstr);

if (!$socket)

{

echo "$errstr($errno)
\n";

}

else

{

// while there is connection, i'll receive it... if I didn't receive a message within $nbSecondsIdle seconds, the following function will stop.

while ($conn = @stream_socket_accept($socket,$nbSecondsIdle))

{

$message= fread($conn, 1024);

echo 'I have received that : '.$message;

fputs ($conn, "OK\n");

fclose ($conn);

}

fclose($socket);

}

}

?>

The following code is for the "client". It send a message, and read the respons...

send_message('127.0.0.1','85','Message to send...');

function send_message($ipServer,$portServer,$message)

{

$fp = stream_socket_client("tcp://$ipServer:$portServer", $errno, $errstr);

if (!$fp)

{

echo "ERREUR :$errno-$errstr
\n";

}

else

{

fwrite($fp,"$message\n");

$response = fread($fp, 4);

if ($response != "OK\n")

{echo 'The command couldn\'t be executed...\ncause :'.$response;}

else

{echo 'Execution successfull...';}

fclose($fp);

}

}

?>To check if there's a new connection waiting, without blocking, or (when using non-blocking mode) without notices), you can use stream_accept (as opposed to socket_select).

class GenericClass {

protected $resSocket=null;

function acceptConnections() {

# check that we still have a resource

if(is_resource($this->resSocket)) {

$arrRead=array($this->resSocket);

$arrWrite=array();

/** @warning Passing $arrRead,$arrWrite by reference */

if(stream_select($arrRead,$arrWrite,$arrWrite,0)) {

$resConnection=stream_socket_accept($this->resSocket,0);

# ... other stuff here

}

}

}

}

?>this function, compared to the function socket_accept, got an extra argument "timeout".

To make this function wait indefinitelly to incoming connections, just as in socket_accept, set timeout to -1. It works for me with PHP 5.0.4.Note that if you use 0 as timeout, the connection will timeout right away.To whom it may concern, and it may concern you greatly, stream_set_blocking has no effect on stream_socket_accept.

If you want it to return right away, connection or not, use 0 for the timeout parameter.

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