error when someone submit regular links !!

[shahbaz419]

i get the following error whan someone submit his site and goes to the payment.php page
Fatal error: Call to undefined function: disable_browser_cache() in /home/drazrco/public_html/payment.php on line 105


can anyboy tell me whats this? and what should i do to remove this error!

here is my directory url =>> www.drazr.com
here is the page where am getting error =>> http://drazr.com/payment.php?id=627

[Richie_Ni]

Where's An0n?:rolleyes:

[shahbaz419]

Where's An0n? whats this?
website details given above