convert mysql result to json with correct types

Question

I know how to get a mysql-row and convert it to json:

$row = mysqli_fetch_assoc(mysqli_query($db, \"SELECT * FROM table WHERE id=1\"));
echo json_encode($row         


        

Answer 1

If you're simply trying to make sure that your values are operable with respect to their type, you need to first cast their type correctly.

Unless you need them server-side, I would just pass-on the json directly to the front-end and do the work there.

In Javascript, you could make an attempt at casting the numbers like so:

function tryNumber(string){

    return !isNaN( parseInt(string) ) ? parseInt(string) : string;

}

function tryDate(string){

    return !isNaN( new Date(string).getTime() ) ? new Date(string) : string;

}

tryNumber('foo'); // "hello"
tryNumber('24'); // 24
tryDate('bar'); // "bar"
tryDate('December 17, 1995'); // "Sun Dec 17 1995 00:00:00 GMT+0000 (GMT)"

These two lines attempt to cast the values as a Date/Number. If they can't be cast, they will remain String's.