PHP and MySQL functions

General information for the website: Database that records software installation requests at a location and what has already been installed.
Kind of development: Customization of existing website
Num. of web pages/modules: 6
Description of requirements/features: 1: Log which users made the software installation request and show their username in the details section of a request.
2: Search - Searches 'software' database table for existing database entries (by software name only) and returns results. Ideally shows 'similar' results and realtime results for existing entries.
3: Export to Excel - Page already has a table of installed software from a MySQL table, button should export all entries to a csv/xls file so it can be opened in Microsoft Excel.
4: Stop duplicate database entries - A request for already installed software shouldn't be possible with a message saying it is already in the table. Site also currently allows multiple entries of same data, it should not allow entry into the database as well as output error messages saying it couldn't be done.
5: Tooltip - 3 pages currently contain text input fields. When input box is selected, a tooltip box to appear with text to let the user know what sort of input is acceptable.
6: Prevent SQL injection and security - Make input into the boxes secure
Extra services needed: Security
Extra notes: Don't have a domain or hosting as it is being hosted locally until it is completed.