Tutorial :UDP write to socket and read from socket at the same time



<?php  error_reporting(E_ALL | E_STRICT);    $socket = socket_create(AF_INET, SOCK_DGRAM, SOL_UDP);    socket_bind($socket, '', 11104);    $from = "";  $port = 0;  socket_recvfrom($socket, $buf, 12, 0, $from, $port);  //$buf=socket_read($socket, 2048);    echo "Received $buf from remote address $from and remote port $port" . PHP_EOL;  $msg="Sikerult";    //socket_write($socket, $msg, strlen($msg));  socket_sendto($socket, $msg, strlen($msg), 0, '', 11104);  //socket_close($socket);  ?>  


    $sock = socket_create(AF_INET, SOCK_DGRAM, SOL_UDP);  $result = socket_connect($sock, '', 11104);      $msg = "Sikerult";      $len = strlen($msg);          //socket_write($sock, $msg, strlen($msg));      socket_sendto($sock, $msg, $len, 0, '', 11104);      //$buf=socket_read($sock, 2048);      socket_recvfrom($sock, $buf, 12, 0, $from, $port);      echo $buf;      socket_close($sock);  ?>  

the server receives the data from the client but the client got nothing from the server and not stop running.


The server is sending the packet back to itself, you need to pass it the port of the client, not of the server. So:

socket_recvfrom($socket, $buf, 12, 0, $from, $port);  socket_sendto($socket, $msg, strlen($msg), 0, $from, $port);  

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