NIUHE

$mysqli=@new mysqli("localhost", "root", "", "mysql");
//如果连接错误
if(mysqli_connect_errno()){
    echo "连接数据库失败：".mysqli_connect_error();
    $mysqli=null;
    exit;
}
//获取当前字符集
echo $mysqli->character_set_name()."<br>";
//获取客户端信息
echo $mysqli->get_client_info()."<br>";
//获取mysql主机信息
echo $mysqli->host_info."<br>";
//获取服务器信息
echo $mysqli->server_info."<br>";
//获取服务器版本
echo $mysqli->server_version."<br>";
//关闭数据库连接
$mysqli->close();