获取div元素的数量

I fetched some div elements from database with this code :

 <?php
$getTickets = mysqli_query($db, "SELECT * FROM usersTicket");
while ($row = mysqli_fetch_array($getTickets)) {
    ?>
        <div class="tickets">
            <div class="ticket"><?php echo $row['ticketText'] ?></div>
        </div>
<?php
}
?>

How can I get the number of these div elements that fetched from database ?

Use this if you want to get the number of divs returned from the database.

 $number_of_divs = mysqli_num_rows($getTickets);

You could use jQuery for that:

$(document).ready(function() {
   var ticketclassnr = $(".tickets").length;
});