如何为套接字设置时间限制 - How to make a time limit for sockets?

How to make a time limit for sockets?

本文关键字：时间设置套接字 | 更新日期: 2023-09-27

如何设置套接字时间限制？http://pastebin.com/0q3NeLAX

我尝试了socket_time_limit和其他方法，但没有帮助。

我希望，如果套接字没有收到任何信息，它将在X秒后关闭。

function QueryMinecraft( $IP, $Port = 25565 )
{
    $Socket = Socket_Create( AF_INET, SOCK_STREAM, SOL_TCP );
    if( $Socket === FALSE || @Socket_Connect( $Socket, $IP, (int)$Port ) === FALSE )
    {
        return FALSE;
    }
    Socket_Send( $Socket, "'xFE", 1, 0 );
    $Len = Socket_Recv( $Socket, $Data, 256, 0 );
    Socket_Close( $Socket );
    if( $Len < 4 || $Data[ 0 ] != "'xFF" )
    {
        return FALSE;
    }
    $Data = SubStr( $Data, 3 );
    $Data = iconv( 'UTF-16BE', 'UTF-8', $Data );
    $Data = Explode( "'xA7", $Data );
    return Array(
        'HostName'   => SubStr( $Data[ 0 ], 0, -1 ),
        'Players'    => isset( $Data[ 1 ] ) ? IntVal( $Data[ 1 ] ) : 0,
        'MaxPlayers' => isset( $Data[ 2 ] ) ? IntVal( $Data[ 2 ] ) : 0
    );
}

我不会为此使用套接字扩展，我只将其用于无法使用fsockopen()完成的高级套接字操作。原因是套接字扩展并不总是可用的，而fsockopen()通常是.

以下是我如何在数据接收超时的情况下编写您的代码：

function QueryMinecraft( $IP, $Port = 25565 )
{
    // Seconds to wait for a successful connection
    $connectTimeout = 5;
    // Seconds to wait for data
    $receiveTimeout = 5;
    $Socket = fsockopen($IP, $port, $errNo, $errStr, $connectTimeout);
    if( !$Socket || !stream_set_timeout( $Socket, $receiveTimeout ) )
    {
        return FALSE;
    }
    fwrite( $Socket, "'xFE" );
    $Data = fread( $Socket, 256 );
    fclose( $Socket );
    if( strlen( $Data ) < 4 || $Data[ 0 ] != "'xFF" )
    {
        return FALSE;
    }
    $Data = SubStr( $Data, 3 );
    $Data = iconv( 'UTF-16BE', 'UTF-8', $Data );
    $Data = Explode( "'xA7", $Data );
    return Array(
        'HostName'   => SubStr( $Data[ 0 ], 0, -1 ),
        'Players'    => isset( $Data[ 1 ] ) ? IntVal( $Data[ 1 ] ) : 0,
        'MaxPlayers' => isset( $Data[ 2 ] ) ? IntVal( $Data[ 2 ] ) : 0
    );
}