Removing 30th and 31st from february in Date Selection List

[terungwa]

My date selection list below allows selection of 30th, 31st and 29th february (on non-leap year). Although I noticed the mysql database is treating those entries as invalid and records them as 0000-00-00.

 

How may i remove this from the user input interface?

<?php
 $monthName = array(1 => "January", "February", "March",
                         "April", "May", "June", "July",
                         "August", "September", "October",
                         "November", "December");
 $today = time();                   //stores today's date
 $f_today = date("M-d-Y",$today);   //formats today's date
$startyear = date("Y")-60;
 echo "<div style = 'text-align: center'>\n";
 echo "<form action='$_SERVER[PHP_SELF]' method='POST'>\n";

 /* build selection list for the month */
 $todayMO = date("n",$today);  //get the month from $today
 echo "<select name='month'>\n";
 for ($n=1;$n<=12;$n++) 
 {
   echo " <option value=$n";
   if ($todayMO == $n)
   {
     echo " selected";
   }
   echo " > $monthName[$n]\n\n</option>";
 }
 echo "</select>\n";

 /* build selection list for the day */
 $todayDay= date("d",$today);    //get the day from $today
 echo "<select name='day'>\n";
 for ($n=1;$n<=31;$n++)  
 {
   echo " <option value=$n";
   if ($todayDay == $n ) 
   {
     echo " selected";
   }
   echo " > $n</option>\n";
 }
 echo "</select>\n";

 /* build selection list for the year */
 echo "<select name='year'>\n";
 for ($n=$startyear;$n<=$startyear+200;$n++)
 {
   echo " <option value=$n";
   if ($startyear == $n )
   {
     echo " selected";
   }
   echo " > $n</option>\n";
 }
 echo "</select>\n";
 echo "<p>
<input type=\"submit\" name=\"insert\" value=\"Insert New Entry\" id=\"insert\">
</p></form></div>\n";
?>

Thanks.

[terungwa]

Currently, I am  subjecting the insert query to the PHP function
checkdate(), which is smart enough to know when its a leap year and prevents mistakes
such as September 31. but again, If i can remove it from the front-end, the better.

if (!checkdate($month,$day,$year)) {
    echo  'You have used an invalid date';
  } else{     
  // create SQL
  $sql = 'INSERT INTO date (
			date_value
			)
		VALUES(?)';
  if ($stmt->prepare($sql)) {
	// bind parameters and execute statement
	$stmt->bind_param('s', $date_value);
    // execute and get number of affected rows
	$stmt->execute();
	if ($stmt->affected_rows > 0) {
	  $OK = true;
	}
  }
  // redirect if successful or display error
  if ($OK) {
	header('Location: insert_success.php');
	exit;
  } else {
	$error = $stmt->error;
  }
}}

[Barand]

Easiest way by far, for you and the user, is to use a datepicker (eg SCW or jQuery datepicker)