Sibling Classes not getting along

trs21219 · 04-26-2008, 02:35 AM

ok here is my prediciment. i have just been recently working with php classes and oop.

i have a system class that i have contain all the other classes (they extend system)

Class System

database extends system
security extends system

how can i get the security and database classes to be able to access each other's functions without including each class file in each function that i want to use that class in

ex. i want to use

PHP Code:


			
$database -> query("query here");

from my security class without including database.class.php in each function i want to call something from the database in

if someone could shed some light on this i would really really appriciate it.

thanks

freenity · 04-26-2008, 11:00 AM

you should have a property in your security class that would be an instance of database class:

PHP Code:


			
class Security
{
    private $db;

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

    public function blabla
    {
        $this->db->query()....
    }
}

Also it would be better to have a method like getDb() that will return the database object in stead of accessing to the variable directly.

Wildhoney · 04-26-2008, 04:38 PM

Freenity is right. Well, not right, but it's also my most favourite way of implementation. Obviously there are occasions where inheritance is the sensible approach.

In Freenity's example, there is no limitation to how many object levels you could have. Such as like:

php Code:

$this->pDb->pResult->pRow->name;

Oh the joys of OOP!

trs21219 · 04-27-2008, 03:57 AM

Quote:

Originally Posted by Wildhoney

Freenity is right. Well, not right, but it's also my most favourite way of implementation. Obviously there are occasions where inheritance is the sensible approach.

In Freenity's example, there is no limitation to how many object levels you could have. Such as like:

php Code:

$this->pDb->pResult->pRow->name;

Oh the joys of OOP!

lol thanks everyone i think i got it.