注意：第21行的C：\\ xampp \\ htdocs \\ isan \\ hasildata.php中的未定义偏移量：0

Question

Hi I receive the following error in my homework and I do not know what is the problem hasildata.php on line 21 :

$dataJson = file_get_contents("https://maps.googleapis.com/maps/api/distancematrix/json?units=metric&origins=".$from."&destinations=".$to."&key=%20AIzaSyCWpwVwu1hO6TJW1H8x_zlhrLfbSbQ2r3o");

$data = json_decode($dataJson,true);
$nilaiJarak = $data['rows'][0]['elements'][0]['distance']['text'];
$time=$data['rows'][0]['elements'][0]['duration']['text'];

Screenshot

Answer 1

You must check whether your request is OK or not

$dataJson = file_get_contents("https://maps.googleapis.com/maps/api/distancematrix/json?units=metric&origins=".$from."&destinations=".$to."&key=%20AIzaSyCWpwVwu1hO6TJW1H8x_zlhrLfbSbQ2r3o");
$data = json_decode($dataJson,true);
if ($data['status'] !== "OK") {
    // Error
    echo $data['error_message'];

    // Do something
} else {
    $nilaiJarak = $data['rows'][0]['elements'][0]['distance']['text'];
    $time=$data['rows'][0]['elements'][0]['duration']['text'];
}