PHP : Cannot update the date in correct format

PHP

Hi

I inserted date into database in date picker ( i mean calender) format… In MySql its type is Date…
I can insert the date in correct format… But when Iam editind the Date in calender… Its saved as 0000-00-00…
It cannot update in correct format… Pls help me
This is my code… In this C Date and Payement Date…

Please help me for this…

<?php error_reporting(0); session_start(); if(!isset($_SESSION['admin'])){ echo ""; } include("../includes/dbconnect.php"); $id=$_GET['id']; if(isset($_POST['submit'])) { $date=$_POST['txtDate']; $advancedpaid=$_POST['advancedpaid']; $paymentdate=$_POST['txtDate1']; $hid=$_POST['id']; $sqlQry =mysql_query("UPDATE `bookdetails` SET `date` = '$date',`advancedpaid` = '$advancedpaid',`paymentdate` = '$paymentdate' where id='$id'"); { $m="

Updated Successfully

"; } } ?> Admin
<?php include("header.php"); ?> <?php include("left.php"); ?>
<?php if(isset($m)) echo $m;?>
<?php $sel_news=mysql_query("select * from bookdetails where id=$id"); $got_news=mysql_fetch_array($sel_news); $rowid=$got_news['id']; $date = $got_news['date']; $advancedpaid = $got_news['advancedpaid']; $paymentdate=$got_news['paymentdate']; ?> <?php include("../includes/dbconnect.php"); $sql=mysql_query("select * from cruize"); ?> <?php include("../includes/dbconnect.php"); $sq=mysql_query("select * from bookdetails"); ?>
 <tr>
  <td colspan="2" align="center">
  <input type="submit" name="submit" id="submit" value="SUBMIT" />      
  <input type="hidden" name="hid" value="<?php echo $rowid; ?>" />
  </td>
 </tr>
 </table>
</form>
Booking Form
C Date:
Advanced Paid: Select Yes No
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