PHP Class Inheritance and extending methods

Question

I want to accomplish the following, but I'm not sure how to do it:

class foo {
    function doSomething(){
        // do something
    }
}

class bar extends foo {
    function doSomething(){
        // do something AND DO SOMETHING ELSE, but just for class bar objects
    }
}

Is it possible to do this while still using the doSomething() method, or do I have to create a new method?

Edit: To clarify, I do not want to have to restate 'do something' in the inherited method, I just want to state it once in the foo->doSomething() method and then build upon it in child classes.

fivedigit · Accepted Answer · 2012-01-27 21:47:38Z

2

You did it right there. If you want to call doSomething() in foo, simply do this in bar:

function doSomething() {
    // do bar-specific things here
    parent::doSomething();
    // or here
}

And the restating a method you mention, is commonly referred to as overloading.

answered Jan 27, 2012 at 21:47

fivedigit

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user142162 · Accepted Answer · 2012-01-27 21:47:48Z

1

You can do this using the parent keyword:

class bar extends foo {
    function doSomething(){
        parent::doSomething();
    }
}

answered Jan 27, 2012 at 21:47

user142162

Comments

TimWolla · Accepted Answer · 2012-01-27 21:48:29Z

0

When extending a class you can simply use $this->method() to use the parent-method, as you have not overwritten it. When you have overwritten it, the snippet will point to the new method. You can access the parent-method via parent::method() then.

answered Jan 27, 2012 at 21:48

TimWolla

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