Записать в БД число кликов по блоку DIV

$dsn      = 'mysql:host=localhost;dbname=ИМЯ_ВАШЕЙ_БД';
$user     = 'ВАШ_ЛОГИН';
$password = 'ВАШ_ПАРОЛЬ';
$dbh      = new PDO($dsn, $user, $password);
 
if ( isset($_POST['action']) and $_POST['action'] == 'count_click' ) {
    $div_url = filter_input(INPUT_POST, 'url', FILTER_VALIDATE_URL);
    $sql     = "SELECT `div_count` FROM `div_count` WHERE `div_url`=:url";
    $sth     = $dbh->prepare($sql);
    $sth->bindValue(':url', $div_url);
    $sth->execute();
 
    if ( $current_count = $sth->fetch(PDO::FETCH_ASSOC) ) {
        $sql     = "UPDATE `div_count` SET  `div_count`=:count WHERE `div_url`=:url";
        $sth     = $dbh->prepare($sql);
        $sth->bindValue(':url', $div_url);
        $sth->bindValue(':count', ++$current_count['div_count'],PDO::PARAM_INT);
        $sth->execute();
    }
    else {
        $sql     = "INSERT INTO `div_count` (`div_url`, `div_count`) VALUES (:url, :count)";
        $sth     = $dbh->prepare($sql);
        $sth->bindValue(':url', $div_url);
        $sth->bindValue(':count', 1);
        $sth->execute();        
    }
}