用PHP实现的服务端socket具体实例

 //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 = 54321; $socketServer = socket_create(AF_INET, SOCK_STREAM, SOL_TCP) or die("socket_create() fail:" . socket_strerror(socket_last_error()) . "/n"); //设置为阻塞模式 socket_set_block($socketServer) or die("socket_set_block() fail:" . socket_strerror(socket_last_error()) . "/n"); //绑定端口 $result = socket_bind($socketServer, $address, $port) or die("socket_bind() fail:" . socket_strerror(socket_last_error()) . "/n"); //开始监听 $result = socket_listen($socketServer, 4) or die("socket_listen() fail:" . socket_strerror(socket_last_error()) . "/n"); do { //接收连接请求并返回一个子Socket来处理客户端和服务器间的信息 $sock = socket_accept($socketServer) or die("socket_accept() failed: reason: " . socket_strerror(socket_last_error()) . "/n"); while($sock){ //读取客户端数据 echo "Read client data \n"; $length = socket_read($sock, 4); $length = unpack('i', $length); echo "length:$length[1] \n"; $request = socket_read($sock, $length[1]); echo "$request:$request \n"; //数据传送 向客户端写入返回结果 $msg = "this is response message \n"; $msgLength = strlen($msg); $msgLength = pack('i', $msgLength); socket_write($sock, $msgLength); socket_write($sock, $msg, strlen($msg)) or die("socket_write() failed: reason: " . socket_strerror(socket_last_error()) ."/n"); break; } } while (true); socket_close($socketServer);