将数组格式化为JSON格式以输入到Google Charts API？

Question

注意，整数值必须是json整数，但是我正在使用字符串。

原始数组是：

   '[{"sctr":"Asset Managers","amount":"1586500"},{"sctr":"Auto 
    Parts","amount":"1618000"},{"sctr":"Business Support 
    Services","amount":"1012020"},{"sctr":"Coal","amount":"1043550"},
    {"sctr":"Consumer Finance","amount":"2285000"},...

然后，我使用以下代码删除键sctr和amount ：

        $sector_final = array();
        array_push($sector_final, array("Sector", "Amount"));
        foreach( $sector_data as $row){
            array_push($sector_final, array_values($row));
        }
        var_dump(json_encode($sector_final));'

给予：

'[["Sector","Amount"],["Asset Managers","1586500"],["Auto
 Parts","1618000"],["Business Support Services","1012020"],
["Coal","1043550"],["Consumer Finance","2285000"],

但是，金额不能用引号引起来，以使Google Chart Api可以正常工作。

我该怎么做，还有一种更有效的方法来删除json的键吗？

Answer 1

尝试在喂入/推动该特定元素之前将其转换为int ：

$sector_final = array();
array_push($sector_final, array("Sector", "Amount"));
foreach( $sector_data as $row){
    $row['amount'] = (int) $row['amount']; // cast it
    array_push($sector_final, array_values($row));
}

Answer 2

$sector_final = array();

    //array_push($sector_final, array("Sector", "Amount"));
    foreach( $sector_data as $row){

        $final = array("Sector" => "' . $row['sector'] . '",
                       "Amount" => $row['amount']);

        array_push($sector_final, $final);
    }
    var_dump(json_encode($sector_final));