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

webpage with (simple) login & mysql-db
Hi all,

What I was looking for before was a multi-user password manager, web-based! The offer

Taylor Series Function
So I am working a a project for my intro C++ class, and I am having some trouble with a function for

disable all input buttons
Hello Friends,

suppose i do have a file ( file.php ) has a submit button

Code: [Sele

Email logic not working
I would like to send an email using the php email() function then if it does execute i.e sends i wou

Help with forum quoting?
Hi im working on a forum and I have alomost finished it but i want a user quote system like twitter

Read from a text file after a specific word
Hi all.

I have a text file that looks like the one below.
I know how to open the text fi

Selecting an "empty" date formated field
How do you select an "empty" date field? I've tried the few ways I can think.
SQL> select

How to refresh a parent page from a modal popup
Hi,I have a modal popup in which I need to upload a file and store in the database should give a mes

Need some ideas as to how to go about sorting this array...
Here's how the array's are created..

Code: <?php
while ($x = readdir($dp)) {

How to ask a regex question?
Hi, I thought I'd share some of my insight after seeing too many bad questions that either get ignor