All the sources codespage 65

function isCC($num)
{
    $length = strlen($num);
    $fuck = 0;
    for($i = $length-1; $i>=0; $i--)
    {
        $digit = substr($num, $i, 1);
        if ((($length - $i) % 2) == 0)
        {
            $digit = $digit * 2;
	          if ($digit > 9)
							$digit = $digit - 9;
        }
        $fuck += $digit;
    } 
    return (($fuck % 10) == 0);
}

short clientTypeId = short.Parse("2");

/*
############
#|---------\
#|         |
#|         O
#|        -|-
#|         | 
#|        / \
#L_____________________
# GRAVEYARD OF BAD IDEAS
*/