function is_leap_year($year)
{
$ts = strtotime("$year-01-01-");
return date('L', $ts);
}
for($i = 2000; $i <= 2010; $i++)
{
$output = "$i is ";
if( !is_leap_year($i) )
$output .= "not ";
$output .= "a leap year.
echo $output;
}
?>