Get last visited page function?

[eluser]phikhanh[/eluser]
Can everyone let me know if codeigniter has a function help us to get the last visited page(URL or URI)?

I knew we can use native PHP $_SERVER['HTTP_REFERER']. But as the manual said "it cannot really be trusted."

[eluser]InsiteFX[/eluser]
Look at CodeIgniters User_Agent Class

InsiteFX

[eluser]phikhanh[/eluser]
Ok, I see it. Thanks

And if possible can you see this http://ellislab.com/forums/viewthread/183905/