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

why this query can delete duplicates ?
why this query can delete duplicates ? Anybody can give me the detailed explanation ?

Tha

Compare user input to flat file data
Help...Am a complete newbie to programming so my code is prolly quite long. Am trying to verify a us

Must be a string? Huh, what? HELP?
with the following script, I get
Fatal error: Property name must be a string in /home/content/e/

How to set pass login name from htaccess to php
When the user logs into my members page via htaccess, I'd like to retain the username so that I can

AutoChoosing a CSS file based on URL
Hey everyone,

I have a site that has multiple URLs and CSS files.

Based on the URL tha

Scheduler problems related to execution of a single BLT by many schedules
Hello all,

We are running several MII instances in a distibuted architecture using a sing

Unifying logins of two different scripts
I have two different game scripts which I want to embed on my own site. The problem is I don't want

SMTP server...
I recently found a tutorial online on SMTP authentification for sending emails from webpages, here i

Does deleting the spmlog directory critical?
Hi Everyone,

Please, hope you could help me. We're having problems with the SAP backup. I

Registration
ok so i have a site where people can register and login which works now thanks to someone on here th