I am a codeIgniter developer and I just started using Sapphire framework and I cant help myself stop drawing parallels between the two but i fail miserably.

I created a job.php file inside mysite/code and wrote the below code inside the same:
------------------

<?php

class Job extends DataObject {
}

class Job_Controller extends Controller {

function order()
{
echo "hi";
}
}
?>

-----------------

And when i write --> localhost/silverstripe/job it says "Page not found"

Please help me here !!!

Are you only using the Sapphire framework or the CMS also? I've never worked with just the framework but if you're using the CMS I think you need to take a few steps back and start at the start - work through these tutorials and you should get a solid understanding of the basics :) http://doc.silverstripe.org/sapphire/en/tutorials/

(If you put localhost/silverstripe/job in your browser SilverStripe is going to try to run a function called 'job' on a page with a url of 'silverstripe' or look for a page called 'job' that's nested under the silverstripe page in the site tree (not sure which takes precedence). It's not finding either so you're getting a 404.)

Cheers