Tag Archives: External Data

External Data Source through AJAX

Call set_data_renderer() function, and pass the following javascript function as js::ajaxDataRenderer. Note the js:: prefix indicating an external javascript function.

Javascript

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var ajaxDataRenderer =
    function(url, plot)
    {
        var ret = null;
        $.ajax({
            // have to use synchronous here, else returns before data is fetched
            async: false,
            url: url,
            dataType:'json',
            success: function(data) {
                ret = data;
            }
        });
        return ret;
    };

In phpChart constructor, pass the external data source as the first parameter as either a file or URL. In this example, it points to jsondata.txt which is external text file on the same server. But it also can be a URL to an external site.

PHP

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$data1 = array();
$pc = new C_PhpChartX('./jsondata.txt','basic_chart_ajax');
$pc->set_title(array('text'=>'Basic Chart Ajax'));
$pc->set_data_renderer("js::ajaxDataRenderer");
$pc->draw();

jsondata.txt

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