如何在PDO中刷新时将数据库字段值增加1？

Question

I search for this question but no one was able to solve my problem. This is my query for to increase database fied value. When I refresh page for first time then it automatically add 2 in one refresh but when I refresh second time then it doesn't update database value.

$stmt = $con->prepare("UPDATE mobile set view2=:view2+'1' WHERE id=:id");
$stmt->execute(array(':view2'=>$view2+1,':id'=>$id));

Help me. I'm new in PDO.

Answer 1

You don't need the parameter at all:

UPDATE ... SET view2 = view2 + 1 WHERE ...

you can use a field in the record as a data source for updating any other field in the record, including itself.