php function get ip address

<?php
function get_ip_address()   // get accurate ip address of client
{
   if (getenv(HTTP_X_FORWARDED_FOR))
    {      $ip_temp = getenv(HTTP_X_FORWARDED_FOR);
    }
    else{   $ip_temp = getenv(REMOTE_ADDR); }

    return $ip_temp;
}
?>