PHP - Mysqli连接使用面向对象的方式打开和关闭 - MySQLi

I am trying to find a way which does the following

• Object Oriented way
• Closing the connection efficiently

• closing a connection anyways

  <?php 
  
   define("HOST", "localhost");
   define("USER", "username");
   define("PASS", "password");
   define("DBNM", "database");
  
   class ConnectionTest extends mysqli {
  
      private $link;
  
      function __construct() {
          $this->link = new mysqli(HOST, USER, PASS, DBNM);
      }
  
      function getLink(){
          return $this->link;
      }
  
      function __destruct() {
          mysqli_close($this->link)
      }
   }
  ?>
  

To try to get to my objective

1. Object Oriented way - Used a class
2. closing connection efficiently - defined a function to close the connection
3. closing a connection anyways - set the same function to be destructor of that class

As I am new to PHP, I would like to know:

• Is this technique proper?
• What complications could occur? or what are the disadvantages to this technique?
• Is there any improvement needed in this code?

Frankly, this class of yours makes very little sense as it effectively duplicates mysqli. All the things you want to achieve, are already implemented in mysqli:

1. Object Oriented way - Mysqli is a class already.
2. There is a function in mysqli to close a connection as well
3. Which is closing a connection efficiently.

So I fail to see how is your class any better than mysqli.