JQuery getJSON / PHP returning data and displaying the data

Question

I have a login using getJSON and PHP.

Right now all it does it checks if the user and password is valid but if it is I want to pass further information to the client.

Right now on the server side I do this:

if ($result->num_rows) {            
    echo '{"response":{"error": "1"}}';         
} else {
    echo '{"response":{"error": "0"}}';
}

and on the client side I have this:

if (json.response.error == "1") {
    data = "Welcome "+username;
    alert(data);
} else {
    // Login fail
    data = "Wrong Username/Password";
    alert(data);
}

So basically it's just checking.

How can I pass some more information from the server to the client?

Update: I've changed the code to this but it's now not working:

Server:

if ($result->num_rows) {

//echo '{"response":{"error": "1"}}';
$data = array(
'response'     => array(
'error'    => 1,
),
'someData'     => 'data';
);
print json_encode($data);
}

Client:

$.getJSON("server.php", {username:username,password:password},function(data)
{

alert('hello');
var json = JSON.parse(data);
alert(json.responseCode);


});

BMN · Accepted Answer · 2014-03-04 10:48:39Z

2

On the server side, You can create an array containing all the data you need and then send it from the server to the client using json_encode() :

$data = array(
    'response'     => array(
        'error'    => 1,
    ),
    'someData'     => 'data',
    ...
);
print json_encode($data);

And on the client side :

var json = JSON.parse(data);
alert(json.response.error);

Hope it helps !

edited Mar 4, 2014 at 10:48

answered Mar 4, 2014 at 10:18

BMN

8,57614 gold badges51 silver badges80 bronze badges

Sign up to request clarification or add additional context in comments.

7 Comments

Satch3000 Over a year ago

I've added it like this but it not longer log's in: echo '{"response":{"error": "1"}}'; $data = array( 'responseCode' => 1, 'someData' => 'data'; ); print json_encode($data);

BMN Over a year ago

I've edited the response, but you also need to remove your echo.

Satch3000 Over a year ago

I've removed the echo from the server code and the client side looks like this:

Satch3000 Over a year ago

var json = JSON.parse(data);alert(json.responseCode);}..but no alerts happening...any ideas?

BMN Over a year ago

The structure of the php array changed, so the structure of the javascript array changed too.

|

Jai · Accepted Answer · 2014-03-04 10:27:44Z

1

You have to use jQuery.parseJSON(json) where json here is a well formed json string.

From the documentation:

It takes a well-formed JSON string and returns the resulting JavaScript object.

So you have to parse the string first to a javascript object.

var json = $.parseJSON(data); // data is the json string
if (json.response.error == "1") {
   data = "Welcome "+username;
   alert(data);
} else {
   // Login fail
   data = "Wrong Username/Password";
   alert(data);
}

answered Mar 4, 2014 at 10:27

Jai

74.8k12 gold badges77 silver badges104 bronze badges

Collectives™ on Stack Overflow

JQuery getJSON / PHP returning data and displaying the data

2 Answers 2

7 Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

7 Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related