$sql = "UPDATE calculators SET name  = :name ,  url  = :url , height  = :height WHERE id_calculator = :id_calculator";
    $stmt = $connectDB->prepare($sql); ;                                  
    $stmt->bindParam(':name', $_POST['name']);       
    $stmt->bindParam(':url', $_POST['$link']);    
    $stmt->bindParam(':height', $_POST['height']);
	$stmt->bindParam(':id_calculator', $_POST['id_calculator'], PDO::PARAM_INT);
  
    $stmt->execute();