452486 Phone Number Campaign Tracking Application

I need a developer to create a system that pulls a phone number via API and displays it on a website based on where the user was referred (search engine, other website, etc) or other identifiable information. The same phone number should be shown on all pages (info stored via cookie or session). There should be general reporting showing how often the number was displayed and called (report pulled via API). This should be a multi-user application with sub-user accounts. Should leverage a MySQL database. Am open to the platform: PHP, Java, etc.