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

Files in current folder. Should be an easy fix.
Never mind. I've asked about this before and just found my answer. Anyway to delete this?

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

RadioButtonList data selection
view plaincopy to clipboardprint?

listing help
Hi,

at first, great new design!!! I like it,

i got a problem,

I want to list so

mysql query with single quotes in a variable
$sitedetails = "INSERT INTO vars (address, sitename, description, ownername, theme) VALUES ('$u

Why do I get this error
Parse error: syntax error, unexpected T_STRING, expecting ',' or ';' in /home/a5488351/public_html/b

Code Review - SQL and Insertion Attacks (Warning: Not for Newbs)
Hey guys,

Its been a while, I know. Use to love coming here to answer peoples questions, but

Calender Not Opening
The following code is not loading the javascript calender in another window. It's not doing anything

Module pool selction screen parameters combination logic
Hi floks,
Am new to the module pool development ,Recently i have created one program based on

FTP issues
Hi all,


I am currently facing some serious problems with a script and really need some ad