Few Questions Reguarding OOP

[livethedead]

Alright so I've been looking through some OOP and I have a few questions regarding principles that are somewhat still foggy for me.

 

In an abstract class should all properties and methods be static? Is it acceptable for example to have a private property with a static getter method?

 

I'll probably be adding more to this thread as I'm trying to do some applying of my knowledge.

 

Thanks.

[scootstah]

Not necessarily. An abstract class simply defines the "structure" of the class for child classes that extend it. You can use static methods, private methods, public methods - it doesn't matter.

[shlumph]

The only time I ever create static variables/functions is when I want to set defaults for a class.  At least, that's what I aim for.  So later on, if I initialize the class and don't inject anything, the defaults will be used.

 

Something like:

<?php
//Assume Table extends Database
class Table extends AbstractDatabase{}

//When bootstrapping the application
$pdo = bla bla
AbstractDatabase::setDefaultAdapter($pdo);

//Later on, in a different section of the app
$table = new Table(); //Uses default adapter

$newPdo = bla bla bla
$table = new Table($newPdo); //Uses the injected PDO