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

pop3 and fsockopen
So I am able to connect to the pop3 server, log in, and check how many messages there are. I am hav

Bit manipulation program with binary operations
My homework is to create a program to scan in and add binary numbers and print them like so

PHP Tab Control
Hi All,

I would like to have PHP tab control with/without Javascript.

But I want to r

Switch letters in message (basic cryptology)...
I am trying to switch letters around in a message for an application on my site (see here). The prob

Wierd if else problem
Hi guys,

this probably aint wierd for you, but it seems like php is playin up to me. may b i

mail() says sent but no email received
My code is quite simple:

Code: <?php
$to = "Ty44ler@yahoo.com";
$subje

please hep to get values from a table row
can anyone tel me how I can select and get data from one row by pressing an Edit button in that row

Display certain image depending on time of year
Hi, I am new to these forums and would really appreciate some advice on a piece of coding I have don

SAP Project Module
I have seen in the SAP Project Module,plan cost and budget are not equal and even difference is sign

TinyMCE / Ajax Postback Problem
Hiya all,

I have a page which loads the TinyMCE editor. On the postback I obviously want to f