PHP上的UDP服务器，端口出现问题

Question

Im trying to create a simple UDP server on php which initially will be receiving some dummy data. I've tried following some tutorials and now i can create and bind a socket. However when im using socket_recvfrom for some reason the page just keeps loading and when i refresh it again, the port is taken and i cant bind the socket in that port anymore. below is my code and any answer is welcomed. `

if(!($sock=socket_create(AF_INET, SOCK_DGRAM, 0)))
{
$errorcode = socket_last_error();
$errormsg = socket_strerror($errorcode);

die("Couldnt create socket: [$errorcode] $errormsg 
");
}
echo "socket create OK";
if (!socket_bind($sock,"localhost",8880))
{
$errorcode = socket_last_error();
$errormsg = socket_strerror($errorcode);

die("Couldnt bind socket: [$errorcode] $errormsg 
");
 }
echo "socket bind OK";

// while(1)
// {
$remote_ip ='';
$remote_port=0;
echo "waiting for data ... 
";
$r=socket_recvfrom($sock, $buf, 512 , 0 , $remote_ip , $remote_port);
echo "$remote_ip : $remote_port --". $buf;
// }

// socket_close($sock);

Answer 1

I ended up using this function:

if (false ===($tcpsock = stream_socket_server("tcp://127.0.0.1:8876",$errorno,$errstr))) echo"tcp socket failed : $errstr($errorno) ";
if(false ===($connection = stream_socket_accept($tcpsock))) echo "tcp accept failed! "; else echo "tcp accepted";

And if you want a UDP socket, you just have to :stream_socket_server("udp://127.0.0.1:8876",$errorno,$errstr)))