Load php class extend by request

Question

I have two classes:

class Init {
     public function test() {
          echo 1;
     }

     public static function loadSecond() {
          // Load the class
     }
}

class Second extends Init {
     public function test2() {
          echo 2;
     }
}

I need to load Second class only by request. For example:

$init = new Init();
$init->test();

$second = $init::loadSecond();
$second->test2();

Answer 1

Replace // Load the class with

return new Second()

You just need to create a new object. (I do not know why you need it to be that way, but this should work for your purpose.

Answer 2

I'm not sure what you need to do. If you mean to include a class whenever you need it automatically :

As Marcin Orlowski mentionned it, what you need is to use the autoloading function of PHP.

Basically it should look like :

function __autoload ($name)
{
    include "/path/to/my/includes/" . $name . "inc.php";
}

If you mean creating an object from another class, you should probably do like

class Init {
     public function test() {
          echo 1;
     }

     public static function loadSecond() {
          return new Second;
     }
}

class Second extends Init {
     public function test2() {
          echo 2;
     }
}

Answer 3

What you need is class autoloading feature implemented. It's basically supported by PHP, so follow the docs: http://php.net/manual/pl/language.oop5.autoload.php