php mysqli两种操作方式示例2

面向对象方法：

$conn =new mysqli('localhost', 'my_user', 'my_password', 'world'); 

$sql = "select * from db_table"; 

$query = $conn->query($sql); 

while($row = $query->fetch_array()){ 

  echo $row['title']; 

} 

面向过程方法：

$conn = mysqli_connect('localhost', 'my_user', 'my_password', 'world') or ('error'); 

$sql = "select * from db_table"; 

$query = mysqli_query($conn,$sql); 

while($row = mysqli_fetch_array($query)){ 

  echo $row['title']; 

}