I am comparing 1st [ Sent ] & 2nd column [ Last Update Date ] values. if 1st column value is greater than 2nd column value , than i want to save the value "attempted" in 3rd column [ Attempted ].
    <table> 
<tr>           
<th class="table-header">Sent</th>
<th class="table-header">Last Update Date</th> 
<th class="table-header">Attempted</th> 
</tr>
<?php
if(!empty($orderrecords))
    {
      foreach($orderrecords as $k=>$v)
      {  
?>
<tr>
<td><?php echo $orderrecords[$k]["sent_date"]; ?></td>         
<td><?php echo $orderrecords[$k]["lud"]; ?></td> 
<td>
<?php 
$orderrecords[$k]["sent_date"]= strtotime($orderrecords[$k]["sent_date"]);
$orderrecords[$k]["lud"]=  strtotime($orderrecords[$k]["lud"]);
$sqlecom = 'UPDATE table SET attempted = "attempted" WHERE $orderrecords[$k]["lud"] < $orderrecords[$k]["sent_date"]';
$db_handleecom = new DBController(); 
$resultecom = $db_handleecom->executeUpdate($sqlecom); 
echo $orderrecords[$k]["attempted"];
?>
</td> 
</tr>
<?php
 }
 }
?>  
</table>      
update : I tried below code, but still 3rd column values are not saving in database.
<?php 
$orderrecords[$k]["sent_date"]= strtotime($orderrecords[$k]["sent_date"]);
$orderrecords[$k]["lud"]=  strtotime($orderrecords[$k]["lud"]);
if ($orderrecords[$k]["lud"] < $orderrecords[$k]["sent_date"])
    {
    $sqlecom = 'UPDATE table SET attempted = "attempted"
               WHERE id = ' . $orderrecords[$k]['id'];
    $db_handleecom = new DBController(); 
    $resultecom = $db_handleecom->executeUpdate($sqlecom);
    //echo "attempted";
} 
echo $orderrecords[$k]["attempted"];
?>
Update 2 :
when i add below code on top of the file, than complete table disappears!!!! :
mysqli_report(MYSQLI_REPORT_ALL & ~MYSQLI_REPORT_INDEX);
here is full code : https://pastebin.com/VwQSjgQ5

