新建PHP文件socket_server.php
<?php // 判断我们的PHP有没有加载sockets模块 if (!extension_loaded('sockets')) { die('对不起你还没有安装sockets扩展.'); } // 接受客户端请求,回复固定的响应内容 function server_listen_socket ($address, $port) { $buffer = "这个消息来自于服务器,socket say hello"; $len = strlen($buffer); // create, bind and listen to socket // 创建通讯节点(套接字) $socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP); if (! $socket) { echo "failed to create socket:" . socket_strerror($socket) . " "; exit(); } // 为这个套接字绑定地址和侦听端口 $bind_flag = socket_bind($socket, $address, $port); if (! $bind_flag) { echo "failed to bind socket:" . socket_strerror($bind_flag) . " "; exit(); } // 侦听端口号 $backlog = 20; $listen_flag = socket_listen($socket, $backlog); if (! $listen_flag) { echo "failed to listen to socket:" . socket_strerror($listen_flag) . " "; exit(); } echo "等待客户端连接中。。。 "; while (1) { if (($accept_socket = socket_accept($socket)) == FALSE) { continue; } else { socket_write($accept_socket, $buffer, $len); socket_close($accept_socket); } } } function run_server () { // pcntl_fork()返回值如果为-1,则说明执行失败 // 0说明在子进程中,大于0说明在父进程中 $pid1 = pcntl_fork(); if ($pid1 == 0) { // first child process // 守护进程的一般流程:fork()->setsid()->fork() posix_setsid(); if (($pid2 = pcntl_fork()) == 0) { $address = "192.168.3.52"; $port = "8767"; server_listen_socket($address, $port); } else { // 防止获得控制终端 exit(); } } else { // wait for first child process exit pcntl_wait($status); } } // 屏蔽76行,打开79-81行不后台运行,打开76行,关闭79-81行启用后台进程守护 // server守护进程 // run_server(); // 不守护进程 $address = "192.168.3.52"; $port = "8767"; server_listen_socket($address, $port);
客户端用telnet请求
如果打开守护进程,服务器端这样显示