think about php late binding issues

Similar to the following code

<code>class father(){
 public function __construct(){
    echo "father";
 }
  
   public static function instance($options = [])
    {
        if (is_null(self::$instance)) {
            self::$instance = new static($options);
        }
        return self::$instance;
    }
}
</code>

Then use the url or configuration to have a subclass to inherit father and call the instance() method to instantiate
How to determine which subclass is called statically?

Reply content:

Similar to the following code

<code>class father(){
 public function __construct(){
    echo "father";
 }
  
   public static function instance($options = [])
    {
        if (is_null(self::$instance)) {
            self::$instance = new static($options);
        }
        return self::$instance;
    }
}
</code>

Then use the url or configuration to have a subclass to inherit father and call the instance() method to instantiate
How to determine which subclass is called statically?

In the method, you can use the get_called_class() function to get the class name that calls this method, which is designed for late static binding.

namespaceNamespace