Raj,
For the application they are not called "phases", but instead PMI calls them "Process Groups". PMI requires that you have some experience hours in all of the 5 groups of Initiating, Planning, Executing, Monitoring & Controlling as well as Closing. However, PMI does not provide a number, like "You must show 50 hours minimum". PMI does not require you to show experience in all 5 groups for all your projects - just overall. So what you need to do is to honestly report your hours to PMI.
My recommendation: Take a look at the paper-based application form to see how to report this:
www.pmi.org/en/Certification/~/media/PDF...lication%20Form.ashx
This is the best you can do to learn about what you need to report.
