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Editorial Team
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Asked: 2026-05-23T12:22:38+00:00

I am developing a website using Codeigniter that will have different subdomains for different

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I am developing a website using Codeigniter that will have different subdomains for different US cities, like Boston.mysite.com, NYC.mysite.com, Philadelphia.mysite.com just like Groupon, Yelp etc. However have never done this before and do not know how to achieve this! Assume my site currently mashes all the cities together but now I want to seperate them into different cities.

Question 1: How do I seperate my website into different cities, each with its own subdomain?

Question 2: Do I have need to duplicate my controllers, views, models for the different cities? What about the database? At this point I dont think there will be any difference in the site for the different cities except the database will not be shared among the different cities

Question 3: Is using IP address a good way to find out which city a user is in so as to redirect the user to the different subdomains?

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1 Answer

  1. Editorial Team

    CodeIgniter subdomains are just folders parallel to the www folder in the site folder.

    Example: /site/boston/htdocs

    They could certainly all share the same database, as the database config is in the application/config and you could have the system folder setup for shared resources across all subdomains. You will still need to setup all the subdomains vhosts in apache.

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