UDP写入套接字并同时从套接字读取(再次修改)

Question

服务器:

<?php
error_reporting(E_ALL | E_STRICT);

$socket = socket_create(AF_INET, SOCK_DGRAM, SOL_UDP);

socket_bind($socket, '192.168.1.7', 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, '192.168.1.6', 11105);
//socket_close($socket);
?>

客户:

<?php
$sock = socket_create(AF_INET, SOCK_DGRAM, SOL_UDP);
$result = socket_connect($sock, '192.168.1.6', 11105);
$msg = "Sikerult";
$len = strlen($msg);
//socket_write($sock, $msg, strlen($msg));
socket_sendto($sock, $msg, $len, 0, '192.168.1.7', 11104);
//$buf=socket_read($sock, 2048);
socket_recvfrom($sock, $buf, 12, 0, $from, $port);
echo $buf;
socket_close($sock);
?>

服务器从客户端接收数据,但客户端没有从服务器获得任何内容,也没有停止运行.

Answer 1

如果它是UDP套接字,那么为什么首先需要连接.这不够吗？

<?php
    $sock = socket_create(AF_INET, SOCK_DGRAM, SOL_UDP);

    $msg = "Sikerult";
    $len = strlen($msg);

    socket_sendto($sock, $msg, $len, 0, '192.168.1.7', 11104);

    socket_recvfrom($sock, $buf, 12, 0, '192.168.1.7', 11104);
    echo $buf;

    socket_close($sock);
?>