PHP Website Detect Mobile and Tablet (mobile website)

I have developed a website in PHP format and have also create separate layouts using CSS for mobile and tablet screens. I need to have a php code applied to the current site to ensure that when a mobile or tablet user visit the main site they will then see the correct mobile or tablet friendly website as opposed to the full website which isn't mobile or tablet friendly. I will give links to websites to those who have provided a quote and contacted us through the private messages interface. Job would need to be completed with a couple of days max Please send through all pervious mobile/tablet website work you have done and reply with MAVERICK to show that you have read and understand the demands of the project.