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I have a set of data from mysql query as per below

hub       | month | frequency 
GALAXY    | 10    | 1
GALAXY    | 11    | 2 
GALAXY    | 12    | 1 
LEVERAGES | 10    | 3 
LEVERAGES | 12    | 2

and i would like to populate the data to json format using json_encode as this :

[{"name":"GALAXY","total":"4","articles":[["10","1"],["11","2"],["12","1"]]},{"name":"LEVERAGES","total":"5","articles":[["10","3"],["12","2"]]}]

But i couldn't get the right json. Below is my code:

$root = array();
$aColumns = array('hub', 'month', 'frequency');
$tangos = $this->Report_Model->getMonthHubTango();


    foreach($tangos->result_array() as $aRow)
                    {
                        $row = array();
                        $total = 0;

                        foreach($aColumns as $col)
                        {
                            $row[] = $aRow[$col];
                            $total += $aRow['frequency'];
                                                    $hub = $aRow['hub'];

                        }
                        $main['name'] = $hub;
                        $main['total'] = $total;
                        $main['articles'][] = $row;                 

                    }

                    $root[] = $main;
echo json_encode($root);

Anyone? Thanks in advance..

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Where is $hub defined in your code? –  kingkero Jan 4 at 2:09
 
It looks like $main['name'] and other two $main are being overwritten with every foreach iteration, so you will get only last iteration results to your $root[] –  Nikolay Jan 4 at 2:11
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2 Answers

up vote 0 down vote

I think, you should add $root[] = $main; into foreach block, so every $main array will be put into $root matrix:

foreach($tangos->result_array() as $aRow)

{
    $row = array();
    $total = 0;

    foreach($aColumns as $col)
    {
        $row[] = $aRow[$col];
        $total += $aRow['frequency'];

    }
    $main['name'] = $hub;
    $main['total'] = $total;
    $main['articles'][] = $row;                 
    $root[] = $main;
}

Plus, you have $hub undefined in loop. So, $main['name'] will probably be undefined.

share|improve this answer
1  
Or $root[]['name'] and so forth. –  Nikolay Jan 4 at 2:14
 
@Nikolay Yes, and get rid of $root completely –  user4035 Jan 4 at 2:15
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up vote 0 down vote 
$root = array();
$tangos = $this->Report_Model->getMonthHubTango();


    foreach($tangos->result_array() as $aRow)
                    {
                        $row = array();
                        $total = 0;

                        foreach($aColumns as $col)
                        {
                            $row[] = $aRow[$col];
                            $total += $aRow['frequency'];

                        }
                        $main['name'] = $hub;
                        $main['total'] = $total;
                        $main['articles'][] = $row;                 
                        $root[] = $main;
                    }


echo json_encode($root);
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