php socket编程

必备知识

pcntl库
    pcntl_fork()
创建一个子进程，创建成功返回子进程的pid号， 创建失败返回-1 

socket系列函数
socket_create();    创建socket
socket_bind();      为socket绑定ip和端口
socket_listen();    监听socket
socket_connect();   开启一个socket连接
socket_read();      读取数据
socket_write();     写入数据socket_accept();    

service.php

<?php

set_time_limit(0);

// 通用变量
$ip = "127.0.0.1";

$port = 3378;

$maxLength = 8192;

// sockets

$sock = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);

$res = socket_bind($sock, $ip, $port);

$res = socket_listen($sock, 10);

// $msgsock = socket_accept($sock);

$pid = 0;

while(1) {
    $msgsock = socket_accept($sock);

    $pid = pcntl_fork();

    if($pid == -1) {
        die("could not fork");
    } else if($pid) {
        // 父进程
    } else {
        // 子进程
        while(1) {
            $buf = socket_read($msgsock, $maxLength);
            $buf = strtoupper($buf);
            socket_write($msgsock, $buf, strlen($buf));
        }
    }

}

socket_close($sock);

clinet.php

<?php

set_time_limit(0);

$ip = "127.0.0.1";
$port = 3378;
$maxLength = 8192;

$sock = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);

socket_connect($sock, $ip, $port);


while(1) {
   //  socket_connect($sock, $ip, $port);
    fwrite(STDOUT, "请输入传递的数据:");
    $res = fgets(STDIN);

    socket_write($sock, $res, strlen($res));

    $rea = socket_read($sock, $maxLength);

    echo $rea;
}

socket_close($sock);