How to show English DateTime to Persian one- PHP

This is a table, it has a field named register_date which is automatically added by DB as a TimeStamp.

I want to show this field as a Persian DateTime. like this image below:

and here is my php piece of code:

<?php
    $q = "SELECT * from `tbl_registers2`";
    $result = $db->query($q);

    $row = 1;
    while ($fields = $result->fetch_assoc()) {
        ?>
        <tr data-id="<?= $fields['id']; ?>">
            <td><?= $row++; ?></td>
            <td><?= $fields['first_name']; ?></td>
            <td><?= $fields['last_name']; ?></td>
            <td><?= $fields['mobile']; ?></td>
            <td><?= $fields['email']; ?></td>
            <td><?= $fields['register_date']; ?></td>
            <td><img class="delete" src="../assets/img/trash.png"></td>
            <td>
                <a href="edit.php?id=<?= $fields['id']; ?>">edit</a>
            </td>
        </tr>
        <?php
    }
    ?>

how to do this?

I've found the solution myself after 3 hours.

the solution is to use the IntlDateFormatter class of PHP like this:

<?php
date_default_timezone_set('Asia/Tehran');

$formatter=new IntlDateFormatter(
    'fa-IR@calender=persian',
    IntlDateFormatter::FULL,
    IntlDateFormatter::FULL,
    'Asia/Tehran',
    IntlDateFormatter::TRADITIONAL,
    "yyyy-MM-d H:m:s"
);


$q = "SELECT * from `tbl_registers2`";
    $result = $db->query($q);

    $row = 1;
    while ($fields = $result->fetch_assoc()) {
        $dateTime = datetime::createfromformat('Y-m-d H:i:s',$fields['register_date']);
        ?>
        <tr data-id="<?= $fields['id']; ?>">
            <td><?= $row++; ?></td>
            <td><?= $fields['first_name']; ?></td>
            <td><?= $fields['last_name']; ?></td>
            <td><?= $fields['mobile']; ?></td>
            <td><?= $fields['email']; ?></td>
            <td><?= $formatter->format($dateTime); ?></td>
            <td><img class="delete" src="../assets/img/trash.png"></td>
            <td>
                <a href="edit.php?id=<?= $fields['id']; ?>">edit</a>
            </td>
        </tr>
        <?php
    }
    ?>

createfromformat from datetime class is used to convert a plain date string which is read from database to a datetime object. after all, $formatter->format($dateTime); shows the results.

to use IntlDateFormatter class, extension=php_intl.dll must be placed in the php.ini.