Converting Date in M d, Y format leads to display date in other rows

问题

We are fetching values of column "due_date" & displaying in site.

Its working fine with help of below code.

$i = 0; 
foreach($order as $orderData) 
{ 
    $k = 0; 

    while ($k < count($orderitemsarray)) { 

        if ($orderitemsarray[$k] != '0') { 

            if($accountType == "admin") { 
                $due_date='';

                while($datas = $stmt1->fetch()) {
                    $due_date=$datas['due_date'];
                    $oDate1 = new DateTime($datas['due_date']); 
                    $sDate1 = $oDate1->format("M d, Y");
                }

                $responce[] = array( $due_date ); 

            }

            return json_encode($responce);

script

var colsOption = [
   {id: 'due_date' , header: " Due Date" , width :"140"},
];

I want to display date in this format :

so i tried below code

$responce[] = array( 
   $sDate1
    );

Now its displaying Date for other rows also, but for those other rows there is no values [ Due date ] in Database.

回答1:

In your code you your are adding values in $response[] using loop. What happens is that value of $sDate1 is not initialized to null. So when it is set for first time it does not change until next due_date value comes so it keeps on repeating last $sDate1 value to solve this , Go to line 152 in this file http://pastebin.com/PnPnX9Wiand bellow it initialize $sDate1. Make changes in this code.

$paid_status='';
$delivery_status='';
$due_date='';

Add $sDate1='';. It will look like this.

    $paid_status='';
    $delivery_status='';
    $due_date='';
    $sDate1='';

Now change this code.

    $due_date=$datas['due_date'];
    $oDate1 = new DateTime($datas['due_date']); 
    $sDate1 = $oDate1->format("M d, Y");

with this code.

$oDate1 = new DateTime($datas['due_date']);
$due_date = $oDate1->format("M d, Y");
$sDate1 = $oDate1->format("M d, Y");

回答2:

You need to apply check for empty date

 while($datas = $stmt1->fetch()) {
      $due_date=$datas['due_date'];
      if(isset($due_date)){  // Apply the check for empty if empty dont pass it to Datetime function.
      $oDate1 = new DateTime($datas['due_date']); 
      $sDate1 = $oDate1->format("M d, Y");  
      $responce[] =  $sDate1;
      }
 }`

回答3:

Updated the code after reading the pastebin (see comments below).

            $sDate1 = '';
            while($datas = $stmt1->fetch()) {
                if ($datas['due_date'] != null) {
                    $oDate1 = new DateTime($datas['due_date']); 
                    $sDate1 = $oDate1->format("M d, Y");
                }
            }

            $responce[] = array( $sDate1 ); 

回答4:

Instead of this part...

        while($datas = $stmt1->fetch()) {
                $due_date=$datas['due_date'];
                $oDate1 = new DateTime($datas['due_date']); 
                $sDate1 = $oDate1->format("M d, Y");
            }

            $responce[] = array( $due_date ); 

        }

        return json_encode($responce);

Try something like this...

        $response = array();
        ...

$i = 0; 
foreach($order as $orderData) 
{ 
$k = 0; 

while ($k < count($orderitemsarray)) { 

    if ($orderitemsarray[$k] != '0') { 

        if($accountType == "admin") { 

        while($datas = $stmt1->fetch()) {
             if(!empty($datas['due_date'])){ 
                // place the Datetime part here... in case $datas['due_date'] is empty*
                $oDate1 = new DateTime($datas['due_date']); 
                $due_date = $oDate1->format("M d, Y");
              } else {
                $due_date = "";
              } 
            }
        ...
        ...
        return json_encode($responce);
        ...

(*) check the output of Datetime here if $datas['due_date'] is "" or null

回答5:

You need to check variable is empty or not and then format the date this the updated code

$i = 0; 
foreach($order as $orderData) 
{ 
$k = 0; 

while ($k < count($orderitemsarray)) { 

    if ($orderitemsarray[$k] != '0') { 

        if($accountType == "admin") { 
            $due_date='';

            while($datas = $stmt1->fetch()) {
                $due_date=$datas['due_date'];
                $oDate1 = new DateTime($datas['due_date']); 
                if (!empty($oDate1))
                    $sDate1 = $oDate1->format("M d, Y");
            }

            $responce[] = array( $due_date ); 

        }

        return json_encode($responce);

来源：https://stackoverflow.com/questions/41238427/converting-date-in-m-d-y-format-leads-to-display-date-in-other-rows