server.php

<?php
//确保在连接客户端时不会超时
set_time_limit(0);


$ip = '127.0.0.1';
$port = 56565;


/*
 +-------------------------------
 *    @socket通信整个过程
 +-------------------------------
 *    @socket_create
 *    @socket_bind
 *    @socket_listen
 *    @socket_accept
 *    @socket_read
 *    @socket_write
 *    @socket_close
 +--------------------------------
 */


/*----------------    以下操作都是手册上的    -------------------*/
if(($sock = socket_create(AF_INET,SOCK_STREAM,SOL_TCP)) < 0) {
    echo "socket_create() 失败的原因是:".socket_strerror($sock)."n";
}


if(($ret = socket_bind($sock,$ip,$port)) < 0) {
    echo "socket_bind() 失败的原因是:".socket_strerror($ret)."n";
}


if(($ret = socket_listen($sock,4)) < 0) {
    echo "socket_listen() 失败的原因是:".socket_strerror($ret)."n";
}


$count = 0;


do {
    if (($msgsock = socket_accept($sock)) < 0) {
        echo "socket_accept() failed: reason: " . socket_strerror($msgsock) . "n";
        break;
    } else {
        
        //发到客户端
        $msg ="测试成功！n";
        socket_write($msgsock, $msg, strlen($msg));
        
        echo "测试成功了啊n";
        $buf = socket_read($msgsock,8192);
        
        
        $talkback = "收到的信息:$bufn";
        echo $talkback;
        
        if(++$count >= 5){
            break;
        };
        
    
    }
    //echo $buf;
    socket_close($msgsock);


} while (true);


socket_close($sock);
?>

client.php

<?php
error_reporting(E_ALL);
set_time_limit(0);
echo "<h2>TCP/IP Connection</h2>n";


$port = 56565;
$ip = "127.0.0.1";


/*
 +-------------------------------
 *    @socket连接整个过程
 +-------------------------------
 *    @socket_create
 *    @socket_connect
 *    @socket_write
 *    @socket_read
 *    @socket_close
 +--------------------------------
 */


$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
if ($socket < 0) {
    echo "socket_create() failed: reason: " . socket_strerror($socket) . "n";
}else {
    echo "OK.n";
}


echo "试图连接 '$ip' 端口 '$port'...n";
$result = socket_connect($socket, $ip, $port);
if ($result < 0) {
    echo "socket_connect() failed.nReason: ($result) " . socket_strerror($result) . "n";
}else {
    echo "连接OKn";
}


$in = "Horn";
$in .= "first bloodrn";
$out = '';


if(!socket_write($socket, $in, strlen($in))) {
    echo "socket_write() failed: reason: " . socket_strerror($socket) . "n";
}else {
    echo "发送到服务器信息成功！n";
    echo "发送的内容为:<font color='red'>$in</font> <br>";
}


while($out = socket_read($socket, 8192)) {
    echo "接收服务器回传信息成功！n";
    echo "接受的内容为:",$out;
}




echo "关闭SOCKET...n";
socket_close($socket);
echo "关闭OKn";
?>

先执行服务端server.php

再执行客户端发数据包