PHP json_encode gapi (google analytics) array returns empty values

Question

I am using the gapi class in a CodeIgniter website. I am using this implementation:

http://jjc.net/2011/google-analytics-api-for-codeigniter/

This returns an array which works perfectly. I want to pass it to my js and I am doing this like so:

$gapi_arr = array();
$gapi_arr = $this->gapi->requestReportData($report_id, array('date'), array('pageviews', 'visits', 'newVisits'), 'date', '', $start_date, $end_date, 1, 366);

echo json_encode($gapi_arr);

However this returns:

[{},{},{},{},{}...

The original array that the gapi class returns looks like this:

Array
(
[0] => gapiReportEntry Object
    (
        [metrics:gapiReportEntry:private] => Array
            (
                [pageviews] => 3
                [visits] => 3
                [newVisits] => 0
            )

        [dimensions:gapiReportEntry:private] => Array
            (
                [date] => 20110101
            )

    )

[1] => ...

I just want to pass this array to my js without writing inline js code in my views. Is there a fix or another way to achieve this?

Answer 1

json_encode() can process object just fine, however, all the properties in the gapiReportEntry object are private and json_encode() only shows the public properties.

This explains all the empty objects {} in the json-array.

Answer 2

Change the PRIVATE by PUBLIC in gapi.php

class gapiReportEntry
    {
      public $metrics = array();
      public $dimensions = array();
      ....

DOne!

Answer 3

json_encode knows how to handle primatives, numeric index arrays and associative arrays. This is none of the above.

Answer 4

The given array is not an array at all, look at the "gapiReportEntry", this is an Object. You should first iterate through all and convert to primitives.