JSON_NUMERIC_CHECK and phone numbers

Question

Our PHP API outputs results using json_encode with JSON_NUMERIC_CHECK enabled, which is important for financial figures, binary values etc.. but we have recently introduced

Answer 1

Had the same issue with phone numbers, this walks over an array (no objects!) to cast only numeric values not starting with 0 or + to an int or float.

        array_walk_recursive($json, function (&$value, $key)
        {
            if(is_string($value) && is_numeric($value))
            {
                // check if value doesn't starts with 0 or +
                if(!preg_match('/^(\+|0)/', $value))
                {
                    // cast $value to int or float
                    $value   += 0;
                }
            }
        });

        return json_encode($json);