PHP Mobile Device Detection is a small class that can detect most of popular internet enabled mobile devices.
It is easy to customize it to fit in your code. You can redirect users to mobile content with 3 lines of code!
Supported devices/operating systems/browsers:
Android
Acer
Asus
Alcatel
Siemens
Blackberry
HTC
HP
LG
Motorola
Nokia
Palm
Samsung
SonyEricsson
ZTE
Mobile
iPhone
iPod
iPad
Opera Mini
Playstation
DoCoMo
Benq
Vodafone
Sharp
Kindle
Nexus
Windows Phone