Note that if you use 0 as timeout, the connection will timeout right away.
$server_socket
[, float $timeout = ini_get("default_socket_timeout")
[, string &$peername
]] )接受由 stream_socket_server() 创建的套接字连接。
server_socket需要接受的服务器创建的套接字连接。
timeout覆盖默认的套接字接受的超时时限。输入的时间需以秒为单位。
peername如果包含该参数并且是可以从选中的传输数据中获取到，则将被设置给连接中的客户端主机的名称（地址）（怕出入很大，附带上原文：Will be set to the name (address) of the client which connected, if included and available from the selected transport.）
Note:
也可以之后通过 stream_socket_get_name() 来确定。
返回接受套接之后的资源流 或者在失败时返回 FALSE。
该函数不能被用于 UDP 套接字。可以使用 stream_socket_recvfrom() 和 stream_socket_sendto() 来取而代之。
Note that if you use 0 as timeout, the connection will timeout right away.
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).
<?php
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
}
}
}
}
?>
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.
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.
This code could be very helpfull...
The following code is for the "server". It listen for a message until CTRL-C
<?php
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)<br />\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...
<?php
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 - $errstr<br />\n";
}
else
{
fwrite($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);
}
}
?>