I want to set expiry date for let say store credit, I have created custom column by installschema in table as:

        $table = $setup->getConnection()->addColumn(
                'type' => Table::TYPE_TIMESTAMP,
                'nullable' => 'false',
                'default' => Table::TIMESTAMP_INIT,
                'comment' => 'Creation Date'

I want to create a column 'expiry date', formula could be:

$expiry_date = $created_at + $one_month;

How to do this manipulation and save value in Table?

1 Answer 1


You can use following code to get next month.

$nextmonth = mktime(0, 0, 0, date("m")+1, date("d"),   date("Y"));

/** @var \Magento\Framework\Stdlib\DateTime\DateTime $dateTime */
$dateTime = $obj->create(\Magento\Framework\Stdlib\DateTime\DateTime::class);

echo $dateTime->gmtDate(); // 2019-07-18 09:35:19
echo "<br>";
echo $dateTime->gmtDate(null, $nextmonth); // 2019-08-18 00:00:00

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