php socket编程入门
服务端
<?php /** * File name server.php * 服务器端代码 * * @author guisu.huang * @since 2012-04-11 * */ //确保在连接客户端时不会超时 set_time_limit(0); //设置IP和端口号 $address = "127.0.0.1"; $port = 2046; //调试的时候,可以多换端口来测试程序! /** * 创建一个SOCKET * AF_INET=是ipv4 如果用ipv6,则参数为 AF_INET6 * SOCK_STREAM为socket的tcp类型,如果是UDP则使用SOCK_DGRAM */ $sock = socket_create(AF_INET, SOCK_STREAM, SOL_TCP) or die("socket_create() 失败的原因是:" . socket_strerror(socket_last_error()) . "/n"); //阻塞模式 socket_set_block($sock) or die("socket_set_block() 失败的原因是:" . socket_strerror(socket_last_error()) . "/n"); //绑定到socket端口 $result = socket_bind($sock, $address, $port) or die("socket_bind() 失败的原因是:" . socket_strerror(socket_last_error()) . "/n"); //开始监听 $result = socket_listen($sock, 4) or die("socket_listen() 失败的原因是:" . socket_strerror(socket_last_error()) . "/n"); echo "OK\nBinding the socket on $address:$port ... "; echo "OK\nNow ready to accept connections.\nListening on the socket ... \n"; do { // never stop the daemon //它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 $msgsock = socket_accept($sock) or die("socket_accept() failed: reason: " . socket_strerror(socket_last_error()) . "/n"); //读取客户端数据 echo "Read client data \n"; //socket_read函数会一直读取客户端数据,直到遇见\n,\t或者\0字符.PHP脚本把这写字符看做是输入的结束符. $buf = socket_read($msgsock, 8192); echo "Received msg: $buf \n"; //数据传送 向客户端写入返回结果 $msg = "welcome \n"; socket_write($msgsock, $msg, strlen($msg)) or die("socket_write() failed: reason: " . socket_strerror(socket_last_error()) ."/n"); //一旦输出被返回到客户端,父/子socket都应通过socket_close($msgsock)函数来终止 socket_close($msgsock); } while (true); socket_close($sock);
客户端
<?php /** * File name:client.php * 客户端代码 * * @author guisu.huang * @since 2012-04-11 */ set_time_limit(0); $host = "127.0.0.1"; $port = 2046; $socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP)or die("Could not create socket\n"); // 创建一个Socket $connection = socket_connect($socket, $host, $port) or die("Could not connet server\n"); // 连接 socket_write($socket, "长连接。。。。。。。。。。。。。。。") or die("Write failed\n"); // 数据传送 向服务器发送消息 while ($buff = socket_read($socket, 1024, PHP_NORMAL_READ)) { echo("Response was:" . $buff . "\n"); } socket_close($socket);