PHP事件日历在周末禁用“添加事件”

I have put this PHP event calendar on my development system. How can I disable adding event on a Saturday or a Sunday? :) Do you think this has to do with this code?

  function dayPullDown($day)
  {
echo "<select name=\"day\">
";

$selected[$day] = ' selected="selected"';

for($i=1;$i <= 31; $i++) {
    $sel = (isset($selected[$i])) ? $selected[$i] : "";
    echo "  <option value=\"$i\"$sel>$i</option>
";
}
echo "</select>

";}

Instead of looping through 31 days, you could use PHP's datetime class and check if today is a weekday (not a weekend) and display the dropdown menu only if your condition is satisfied:

$date = new DateTime();
if($date->format('N') < 6) {
    echo "<select name=\"day\">
";
    $sel = (isset($selected[$i])) ? $selected[$i] : "";
    echo "  <option value=\"$i\"$sel>$i</option>
";
    echo "</select>

";
}