php client List - Add Security

Hello Freelancers. I started a project and all of the existing code is done and functioning. It's a client list that has add, edit, delete, and search feature. I need to add 4 additional features. 1. I want all the form input boxes to not allow html inserted. (htmlspecialchars) 2. I want to make sure that no one can inject my database from any of the form input boxes. (magicQuotes mysql_real_escape_string) 3. Add download button which downloads the contact list table as an excel file to the users computer. 4. Automatically logout after 2 hours or what ever you recommend. I will send you a link for you to see it functioning. I will also provide you with the php files. How website works. - login page which triggers a start session and directs them to the client list page. Client list page list 50 clients per page. Client list page they can search/add/delete users. There is also an edit button that loads a new page where they can edit the clients information. I attached screen shots for you to see the pages. I know html & css and a little php, & javascript. The Mysql database I have already created. There are two tables one for login and one for the client list. Once you finish I will upload the files and test it myself. Good luck freelancers.