How to make a time limit for sockets? - php

Question

How to make socket time limit ?
http://pastebin.com/0q3NeLAX
I tried socket_time_limit and others, but didnt help.
I want that if socket does not received any information, it will be closed after X seconds.
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
);
}

Answer 1

I would not use the sockets extension for this, I only use that for advanced socket operations that cannot be done using fsockopen(). The reason for this is that the sockets extension is not always available, whereas fsockopen() usually is.
Here is how I would write your code, with a data receive timeout:
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
);
}