Loading graphs on gwt using native javascript and php database for the datatable

private static native void generateGraph(String stationName)/*-{

$wnd.google.load("visualization", "1.0", {

packages : [ 'corechart' ],

callback : drawVisualization

});

function drawVisualization() {

// Create and populate the data table.

var data = $wnd.google.visualization.arrayToDataTable(([

        ['Date', 'Score'],

        <?php

           $output = array ();

            while($result = mysql_fetch_array($sql_data)) {

                $t1 = strtotime($result['date']);

                $t2 = date("d",$t1);

                $output[] = "[".$t2.",".$result['sales']."]"; // note there is no comma at the end here          }

           echo implode(',', $output);

        ?>

    ]);

//

new $wnd.google.visualization.LineChart($wnd.document

.getElementById('visualization')).draw(data, {

title : stationName,

width : 600,

height : 400,

vAxis : {

title : "Year"

},

hAxis : {

title : "Sales"

}

});

}

}-*/;

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