Fatal error curl_reset() undefined why?

Question

I am using curl to request another site for getting data. My code having curl_reset() funciton is working well at localhost, but when i have updated my code to

Answer 1

Requires no PHP version updating.

if (!function_exists('curl_reset'))
{
    function curl_reset(&$ch)
    {
        $ch = curl_init();
    }
}