Elgg framework

I am new to this framework. I have an application which is developed in elgg framework. Its running in the server successfully. I want to setting up this in my local system. I have installed PHP, mysql and apache and I have put my project in /var/www/html/. What I am finding is one variable ($CONFIG->views->locations) contains no information, but in server this variable contains information. Please tell me what settings or configuration have to do for solving this issue