undefined variable in jquery ajax

Question

in this my code data is undefined why? i can't access to data.message.

$.post("actions.php", {name_madan: madan , postaction:'sabte_madan' },
    function(data){
    if (data.success)
           alert(data.message);
    });

actions.php

case 'sabte_madan':
    $query="SELECT * from maadan WHERE name_madan='{$_POST['name_madan']}'";
    $result=$db->loadAssoc($db->setQuery($query));
    if ( !$result )
    {           
    $data['success']=true;  $data['message']='ok';
    }
    else $data['success']=false;    $data['message']='no';              

break;

if ( isset ($data)) echo json_encode($data);

Looks like $data is only being set if !$result. Are you missing the else part of the if statement? — JoeFletch
– JoeFletch, Commented Oct 26, 2012 at 15:21
You need to add ,'json' to your $.post to tell jQuery to parse it as JSON. — gen_Eric
– gen_Eric, Commented Oct 26, 2012 at 15:22
May be this can help if ( !$result ) { $data['success']=false; $data['message']='ok'; } else { $data['success']=true; } — Jashwant
– Jashwant, Commented Oct 26, 2012 at 15:23
Anyway, can you insert some debugging into this case block? — raina77ow
– raina77ow, Commented Oct 26, 2012 at 15:24
Also, I wonder how exactly do you check for data undefinedness. Or it's data.success that is not true here? Also, do you understand that your code is vulnerable to SQL injections? — raina77ow
– raina77ow, Commented Oct 26, 2012 at 15:28

leodudedev · Accepted Answer · 2012-10-26 15:27:55Z

1

you miss 'json' data type

$.post("actions.php", {name_madan: madan , postaction:'sabte_madan' },
    function(data){
        if (data.success)
           alert(data.message);
    },'json');

answered Oct 26, 2012 at 15:27

leodudedev

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