php mysqli 连接数据库

$con=mysqli_connect("localhost","my_user","my_password","my_db");

$conn = new mysqli(“localhost”, “root”, “123”, “db”);

　if ($conn->connect_error) {
　　trigger_error(‘Database connection failed: ‘ . $conn->connect_error, E_USER_ERROR);
　}
　$conn->query("SET NAMES ‘UTF8‘"); //设置编码

$result = $conn->query("SELECT * FROM  news");

while ($row = $result->fetch_array()) {   
    echo ($row["name"]) . "<br>";
    echo ($row["author"]) . "<br>"; 
    echo ($row["time"]) . "<br>"; 
    echo "<hr>"; 
}

　　while($row=$result->fetch_object())
   {
        echo ‘‘.$row->content; //content-->是表的字段名
   }