Hello Sir
I have read your full requirement. Login/Register, Text / Code Posting, Forms etc.
You are requiring a website like stackoverflow.
I can build your website sir as i understand what you need.
I have more than 6 years of work experience in PHP, Wordpress, Graphics Design, Website Design, Bitcoins, HTML, Magento, CSS, Javascript, Code Igniter and C#.net development.
Waiting for your reply
Thanks