php使用socket

<?php 
set_time_limit(0);
// 设置主机和端口
$host = "127.0.0.1";
$port = 12387;
// 创建一个tcp流
$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP) 
or die("socket_create() failed:" . socket_strerror(socket_last_error()));
// 设置阻塞模式
socket_set_block($socket) 
or die("socket_set_block() failed:" . socket_strerror(socket_last_error()));  
// 绑定到端口
socket_bind($socket, $host, $port) 
or die("socket_bind() failed:" . socket_strerror(socket_last_error()));
// 开始监听
socket_listen($socket, 4) 
or die("socket_listen() failed:" . socket_strerror(socket_last_error()));
echo "Binding the socket on $host:$port ... \n";
while (true) {
// 接收连接请求并调用一个子连接Socket来处理客户端和服务器间的信息
if (($msgsock = socket_accept($socket)) < 0) {
    echo "socket_accept() failed:" . socket_strerror(socket_last_error());
}else{
    // 读数据
    $out = ‘‘;
    while($buf = socket_read($msgsock,8192)){
        $out .= $buf;
    }
    // 写数据
    $in = "数据是 $out";
    socket_write($msgsock, $in, strlen($in));
}
// 结束通信
socket_close($msgsock);
}
socket_close($socket);

<?php 
set_time_limit(0);
$host = "127.0.0.1";  
$port = 12387;
// 创建一个tcp流
$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP) 
or die("socket_create() failed:" . socket_strerror(socket_last_error()));
echo "try to connect to $host:$port...\n";
$result = socket_connect($socket, $host, $port)
or die("socket_connect() failed:" . socket_strerror(socket_last_error()));
$in = "hello \n";
if(!socket_write($socket, $in, strlen($in))) {
echo "socket_write() failed:" . socket_strerror($socket);
}else {
echo "发送成功！\n";
}
$out = ‘‘;
while($buf = socket_read($socket, 8192)) {
$out .= $buf;
}
echo "接受内容为：$out \n";
socket_close($socket);