PHP与socket编程

//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;/** * 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 */$sock = socket_create(AF_INET, SOCK_STREAM, SOL_TCP) or die_error();//阻塞模式socket_set_block($sock) or die_error();//绑定到socket端口$result = socket_bind($sock, $address, $port) or die_error();//开始监听$result = socket_listen($sock, 4) or die_error();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_error(); ???//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_error(); ???//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($sock);/** * 展示错误 * @return string */function die_error(){ ???$errorcode = socket_last_error(); ???$errormsg = socket_strerror($errorcode); ???die("Couldn't create socket: [$errorcode] $errormsg" . PHP_EOL);}

set_time_limit(0);$host ??= "127.0.0.1";$port ??= 2046;// 创建一个Socket$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP) or die_error();// 连接socket$connection = socket_connect($socket, $host, $port) or die_error();// 数据传送 向服务器发送消息socket_write($socket, "hello socket") or die_error();while ($buff = socket_read($socket, 1024, PHP_NORMAL_READ)) { ???echo ("Response was:" . $buff . "\n");}socket_close($socket);/** * 展示错误 * @return string */function die_error(){ ???$errorcode = socket_last_error(); ???$errormsg = socket_strerror($errorcode); ???die("Couldn't create socket: [$errorcode] $errormsg" . PHP_EOL);}

# server.php$addr ?= '127.0.0.1';$port ?= 80;/** * 指定协议，绑定端口，添加引用两个错误信息提示参数 * 这一步完成了sokect 绑定 */$server = stream_socket_server("tcp://$addr:$port", $errno, $errorMessage);if ($server === false) { ???throw new UnexpectedValueException("Could not bind to socket: $errorMessage");}for (;;) { ???//它接收连接请求并调用一个子连接Socket来处理客户端和服务器间的信息 ???$client = @stream_socket_accept($server); ???if ($client) { ???????//从第一个参数的流中复制字节，将其作为第二个参数流,返回客户端请求内容 ???????stream_copy_to_stream($client, $client); ???????//关闭客户端连接 ???????fclose($client); ???}}

# client.php//连接的主机的IP地址//$addr = gethostbyname("www.example.com");$addr = '127.0.0.1';$port = 80;//创建socket连接$client = stream_socket_client("tcp://$addr:$port", $errno, $errorMessage);if ($client === false) { ???throw new UnexpectedValueException("Failed to connect: $errorMessage");}//套接字连接由stream_socket_client是溪流，就像通过fopen打开文件fwrite($client, "GET / HTTP/1.0\r\nHost: www.example.com\r\nAccept: */*\r\n\r\n");//获取响应echo stream_get_contents($client);fclose($client);