我正在使用php构建一个用于GPS跟踪系统的监听服务器。 GPS通过UDP数据包发送数据,运行下面的脚本可以显示出这些数据包。但是实际的数据以符号形式输出,我猜测我错过了一些转换操作。
//Reduce errors
error_reporting(~E_WARNING);
//Create a UDP socket
if(!($sock = socket_create(AF_INET, SOCK_DGRAM, 0)))
{
$errorcode = socket_last_error();
$errormsg = socket_strerror($errorcode);
die("Couldn't create socket: [$errorcode] $errormsg \n");
}
echo "Socket created \n";
// Bind the source address
if( !socket_bind($sock, "192.168.1.29" , 1731) )
{
$errorcode = socket_last_error();
$errormsg = socket_strerror($errorcode);
die("Could not bind socket : [$errorcode] $errormsg \n");
}
echo "Socket bind OK \n";
//Do some communication, this loop can handle multiple clients
while(1)
{
echo "\n Waiting for data ... \n";
//Receive some data
$r = socket_recvfrom($sock, $buf, 512, 0, $remote_ip, $remote_port);
echo "$remote_ip : $remote_port -- " . $buf;
//Send back the data to the client
//socket_sendto($sock, "OK " . $buf , 100 , 0 , $remote_ip , $remote_port);
}
socket_close($sock);