Why use interfaces in PHP (OOP)

Posted on 16th Feb 2014 07:03 pm by admin

I am learning OOP in PHP and its been a pretty good learning experience so far. What I didn't understand at all is interfaces. I understand the implications of multiple inheritance, and interface is used just to solve that. But what's the use?
If we have to define the function in derived class why use interface, why not directly declare and define it inside the derived class?
Am I missing something or is it really useless?

Your Answer:

Login to answer

Other forums

Multi Dimensional Array Append
Hi Guys

I have a function that returns a multidimentional array eg

$result = functio

Placing and array within an array then sorting it!
I have a page that runs two large mysql queries and saves the results into arrays, in php I then per

Typing math
I've added support for typesetting math using LaTeX on the forums.

Example:
Code: [Select]

Shopping Cart
Can anyone direct me to a Simple, Basic structure of a shopping cart.
New to classes. I want to s

HeaderSelectedCssClass not working
I have an accordian where I have a drop down list in the first pane and a grid in the second pane.

Dynamically set AccordianPane Header
I have an accordian on my master page. I'd like to be able to dynamically change the header on diff

set xml path in flash when xml created in memorystream and webrequest
i am creating an xml file using memory stream and i want to load this xml file into the flash on cli

matching numbers inside ( )
I know I can match numbers by just [0-9]+, so I thought matching numbers inside ( ) would be somethi

EU VAT Package 2010
Does any one know whether SAP will be developing new reporting functionality due the new VAT rules t

Something Non-Traditional. Can we solve?
I have an idea for an application here. It's mostly flash, but it couldn't work without a somewhat n