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

Calling variables
I want to call this to my website but it doesn't display what I want it to,

Code: <h5&

Login Control?!
I have a Web Site that uses the login control also I have set the destinationurl to the page I want

ORA-00932: inconsistent datatypes: expected - got CLOB
SO : windows xp
database : XE

there is a table (transito) with two fields of clob

Xacute search within SQL results
I have a query that is pulling data, and I want to return a specific value from the results of that

Mail Script Problems
I have created a PHP mail script. I am having a problem though. In $body i am trying to put two va

how do i display data on a page from mysql
1 - do i use this code at the top of each of my page i wish to only alow access if there as been a s

PHP Code reffering to database, doing something wrong.. pls help
Well i am quite new with PHP
and for school we have to make a PHP script which reffers to a Data

in php, link returns to the line
When I add a link in a php page, the link word returns to the line (as a
would do)

Examp

Echo multiple lines of html code
Hi guys,

I would like to know if there is a way to echo multiple lines of html codes.

firefox wouldnt stream mp3 files completely from my php page
hi everyone,
I have a php file trying to read and stream mp3 files. It works fine in IE but my pr