存在多个同名PHP的键的JSON总和值

function sumSameNameKeys($data, $key) {
    $sum = 0;
    foreach ($data as $k => $value) {
        if ($k === $key) {
            if (is_numeric($value)) {
                $sum += $value;
            }
        } elseif (is_array($value) || is_object($value)) {
            $sum += sumSameNameKeys($value, $key);
        }
    }
    return $sum;
}

$json = '{"PHP": 10, "JavaScript": 20, "PHP": 30, "Python": 40}';
$data = json_decode($json, true);

$sum = sumSameNameKeys($data, "PHP");
echo "总和值为: " . $sum;