Data column(s) for axis #0 cannot be of type string error in google chart

Question

I tried to populate google chart datatable in server side using PHP.I got JSON file properply, but the Chart not display in client Application. I got error-Data colu

Answer 1

To extend on @sajal's accurate answer: Change the last line of your code from:

echo json_encode($table);

to:

echo json_encode($table, JSON_NUMERIC_CHECK);

This will tell json_encode to recognize numbers and abstain from wrapping them in quotes (Available since PHP 5.3.3.). http://php.net/manual/en/json.constants.php#constant.json-numeric-check