Including Objects within another object

[enerjiza]

I'm still relatively new to OOP so I'm not sure if I'm doing this effeciently.

 

Below are 2 examples of how I'm handling classes:

class authors {
private $db;
private $articles;

public function __construct($db) {
$this->db = $db;
$this->articles = new Articles();
}

}

 

Is there any other way I can call methods from the articles class without instantiating the articles class in the Authors class?

 

I'm using PDO and passing the connection to the Authors class in the construct, is this the right way or is there a better way of handling this?

 

Any input would be great.

 

[SiriusB]

I am new to PHP, but I am familiar with OO Programming through Java and C#.

 

There is nothing wrong with using classes inside other classes.  It is a normal occurance.