Can I build a Hybrid Mobile App using PhoneGab or Telerik for an application built using PHP and MySQL running on AWS or any Hosting platform.
For PhoneGap you can only use HTML / CSS / JavaScript.
However if you have an app you built using PHP / MySQL you can connect to it within your PhoneGap application via ajax.
So the answer to your question is yes, you can build a mobile app for your application built using PHP and MySQL.