For our existing application we want to add the following functionality:
1) All users should be automatically logged out of the application at 2 specific times each day. Once the users are logged out automatically they can then log back into the application. Our time zone is Eastern Standard Time (EST) and the server's time is Central Standard Time (CST) which is 1 hour earlier than EST.
2) This feature should be simple and should not put any strain on the server.
After review of your posting, I am confident that I can assist you in making modifications to your application. I have been writing applications for years and am a very competent PHP developer. I am definitely interested in learning more about this project.
If you want this project completed with all your expectations satisfied and with no hassle, then I'm the freelancer you are looking for!