[英]Get distance between two location using google api
我有以下代码:
$output = file_get_contents("http://maps.google.com/maps/nav?q=from:39.519894,-5.105667%20to:51.129079,1.306925");
$distance = json_decode($output);
我从Google API获得JSON响应,但是当我使用json_decode()
解码JSON时,我得到一个NULL
值意味着该函数无法对其进行解码。
这背后的原因是什么?
这应该对你有用,你可以将地址或纬度/经度传递给$ from和$ to
$from = "Więckowskiego 72, Łódź";
$to = "Gazowa 1, Łódź";
$from = urlencode($from);
$to = urlencode($to);
$data = file_get_contents("http://maps.googleapis.com/maps/api/distancematrix/json?origins=$from&destinations=$to&language=en-EN&sensor=false");
$data = json_decode($data);
$time = 0;
$distance = 0;
foreach($data->rows[0]->elements as $road) {
$time += $road->duration->value;
$distance += $road->distance->value;
}
echo "To: ".$data->destination_addresses[0];
echo "<br/>";
echo "From: ".$data->origin_addresses[0];
echo "<br/>";
echo "Time: ".$time." seconds";
echo "<br/>";
echo "Distance: ".$distance." meters";
返回值的格式错误的UTF-8字符可能是因为编码不正确。 你需要的只是utf8_encode
$json = file_get_contents('http://maps.google.com/maps/nav?q=from:39.519894,-5.105667%20to:51.129079,1.306925');
$data = json_decode(utf8_encode($json),true);
var_dump($data);
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