[PHP] Simple Server An/Aus Grafik

<?php
	define("SERVER_IP", "127.0.0.1");
	define("SERVER_PORT", "7777");
	header("Content-type: image/png");
	function isServerOnline( $ip, $port )
	{
		$temp_ip = strip_tags( $ip );
		$temp_port = strip_tags( $port );
		$ipArray = explode('.', $temp_ip);
		$package = "SAMP".chr( $ipArray[0] ).chr( $ipArray[1] ).chr( $ipArray[2] ).chr( $ipArray[3] ).chr($temp_port & 0xFF).chr($temp_port >> 8 & 0xFF)."i";
		$connect = @fsockopen('udp://'.$temp_ip, $temp_port, $errI, $errS, 2);
		@fwrite($connect, $package); 
		$result = @fread($connect, 11);
		if( empty($result) ) return 0;
		else return 1;
	}
	$pic = ImageCreate(200, 50);
	$weiss = ImageColorAllocate($pic, 255, 255, 255);
	$schwarz = ImageColorAllocate ($pic, 0, 0, 0);
	ImageFilledRectangle($pic, 0, 0, 200, 50, $schwarz);
	if( isServerOnline( SERVER_IP, SERVER_PORT )) ImageString($pic, 15, 60, 15, "Online", $weiss);
	else ImageString($pic, 15, 60, 15, "Offline", $weiss);
	ImagePNG($pic);
	ImageDestroy($pic);
	exit;
?>