php socket 进程间通信

<?php
set_time_limit(0);
$host = ‘0.0.0.0‘;
$port = 10086;
//创建socket
$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP) or die("创建连接失败");
//绑定socket　到指定地址和端口
$result = socket_bind($socket, $host, $port) or die("绑定失败");
//监听连接
$result = socket_listen($socket, 3) or die("监听失败");
//接收连接请求并调用另一个子Socket处理客户端－－服务器间的信息
$spawn = socket_accept($socket) or die("accept not");
while (1){
    //读取客户端输入
    $input = socket_read($spawn, 1024) or die("can not read");
    $input = trim($input);
    if($input == ‘close‘){
        $output = "关闭了连接" . $input . "\n";
        socket_write($spawn, $output, strlen($output)) or die("write die");
        socket_close($spawn);
        socket_close($socket);
        die(‘客户端关闭了‘);
    }
    $output = "发送成功:" . $input . "\n";
    socket_write($spawn, $output, strlen($output)) or die("write die");
    var_dump($input);
}