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POObtaining information from a returned array - Confusion
 

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  1. POObtaining information from a returned array - Confusion
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    <p>Afternoon! I've looked around everywhere for an answer to this, I'm attempting to build a site for a company, and they would like a form of check to their external server. I have the class that checks for this information, and have confirmed it works by using print_r(), however I'm looking for something a lot more specific from the class - just to clarify, I am very new to PHP, and do not know a heck of a lot.</p> <p>This is the class:</p> <pre><code>class MinecraftQueryException extends Exception { // Exception thrown by MinecraftQuery class } class MinecraftQuery { /* * Class written by xPaw * * Website: http://xpaw.ru * GitHub: https://github.com/xPaw/PHP-Minecraft-Query */ const STATISTIC = 0x00; const HANDSHAKE = 0x09; private $Socket; private $Players; private $Info; public function Connect( $Ip, $Port = 25565, $Timeout = 3 ) { if( !is_int( $Timeout ) || $Timeout &lt; 0 ) { throw new InvalidArgumentException( 'Timeout must be an integer.' ); } $this-&gt;Socket = @FSockOpen( 'udp://' . $Ip, (int)$Port, $ErrNo, $ErrStr, $Timeout ); if( $ErrNo || $this-&gt;Socket === false ) { throw new MinecraftQueryException( 'Could not create socket: ' . $ErrStr ); } Stream_Set_Timeout( $this-&gt;Socket, $Timeout ); Stream_Set_Blocking( $this-&gt;Socket, true ); try { $Challenge = $this-&gt;GetChallenge( ); $this-&gt;GetStatus( $Challenge ); } // We catch this because we want to close the socket, not very elegant catch( MinecraftQueryException $e ) { FClose( $this-&gt;Socket ); throw new MinecraftQueryException( $e-&gt;getMessage( ) ); } FClose( $this-&gt;Socket ); } public function GetInfo( ) { return isset( $this-&gt;Info ) ? $this-&gt;Info : false; } public function GetPlayers( ) { return isset( $this-&gt;Players ) ? $this-&gt;Players : false; } private function GetChallenge( ) { $Data = $this-&gt;WriteData( self :: HANDSHAKE ); if( $Data === false ) { throw new MinecraftQueryException( "Failed to receive challenge." ); } return Pack( 'N', $Data ); } private function GetStatus( $Challenge ) { $Data = $this-&gt;WriteData( self :: STATISTIC, $Challenge . Pack( 'c*', 0x00, 0x00, 0x00, 0x00 ) ); if( !$Data ) { throw new MinecraftQueryException( "Failed to receive status." ); } $Last = ""; $Info = Array( ); $Data = SubStr( $Data, 11 ); // splitnum + 2 int $Data = Explode( "\x00\x00\x01player_\x00\x00", $Data ); $Players = SubStr( $Data[ 1 ], 0, -2 ); $Data = Explode( "\x00", $Data[ 0 ] ); // Array with known keys in order to validate the result // It can happen that server sends custom strings containing bad things (who can know!) $Keys = Array( 'hostname' =&gt; 'HostName', 'gametype' =&gt; 'GameType', 'version' =&gt; 'Version', 'plugins' =&gt; 'Plugins', 'map' =&gt; 'Map', 'numplayers' =&gt; 'Players', 'maxplayers' =&gt; 'MaxPlayers', 'hostport' =&gt; 'HostPort', 'hostip' =&gt; 'HostIp' ); foreach( $Data as $Key =&gt; $Value ) { if( ~$Key &amp; 1 ) { if( !Array_Key_Exists( $Value, $Keys ) ) { $Last = false; continue; } $Last = $Keys[ $Value ]; $Info[ $Last ] = ""; } else if( $Last != false ) { $Info[ $Last ] = $Value; } } // Ints $Info[ 'Players' ] = IntVal( $Info[ 'Players' ] ); $Info[ 'MaxPlayers' ] = IntVal( $Info[ 'MaxPlayers' ] ); $Info[ 'HostPort' ] = IntVal( $Info[ 'HostPort' ] ); // Parse "plugins", if any if( $Info[ 'Plugins' ] ) { $Data = Explode( ": ", $Info[ 'Plugins' ], 2 ); $Info[ 'RawPlugins' ] = $Info[ 'Plugins' ]; $Info[ 'Software' ] = $Data[ 0 ]; if( Count( $Data ) == 2 ) { $Info[ 'Plugins' ] = Explode( "; ", $Data[ 1 ] ); } } else { $Info[ 'Software' ] = 'Vanilla'; } $this-&gt;Info = $Info; if( $Players ) { $this-&gt;Players = Explode( "\x00", $Players ); } } private function WriteData( $Command, $Append = "" ) { $Command = Pack( 'c*', 0xFE, 0xFD, $Command, 0x01, 0x02, 0x03, 0x04 ) . $Append; $Length = StrLen( $Command ); if( $Length !== FWrite( $this-&gt;Socket, $Command, $Length ) ) { throw new MinecraftQueryException( "Failed to write on socket." ); } $Data = FRead( $this-&gt;Socket, 2048 ); if( $Data === false ) { throw new MinecraftQueryException( "Failed to read from socket." ); } if( StrLen( $Data ) &lt; 5 || $Data[ 0 ] != $Command[ 2 ] ) { return false; } return SubStr( $Data, 5 ); } } </code></pre> <p>I am trying to get data from the GetInfo() function, I have done some googling around about returning and functions, and tried some things: <pre><code> $Query = new MinecraftQuery( ); try { $Query-&gt;Connect( 'ipgoeshere', 25565 ); $Info = $Query-&gt;GetInfo(); $maxPlayers = $Info['maxplayers']; echo $maxPlayers; } catch( MinecraftQueryException $e ) { echo $e-&gt;getMessage( ); } </code></pre> <p>Am I doing something wrong here? Or is this the completely wrong type of method. A solution would be fantastic!</p>
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    1. COyour function received 3 arguments and you are giving only two $Query->Connect( 'ipgoeshere', 25565 ); give like this Connect( 'ipgoeshere', 25565, '' );
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      1. POObtaining information from a returned array - Confusion
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    2. CODo you connect with the correct IP? 'ipgoeshere' = the actual IP address? 2 args on connect is fine, as param list does specify default values.
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    3. CO@vidario I am yes, it connects and when I use print_r it prints the correct information, I'm just trying to specify down the information to certain items.
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