google-maps - 谷歌地图 API : how to check if an address or location is valid?

Question

这是我的问题:我有一个网页，我正在尝试使用自动完成，就像这样，非常非常基本:

<script type="text/javascript"
        src="https://maps.googleapis.com/maps/api/js?libraries=places"></script>
<script type="text/javascript">
    $(document).ready(function () {
        new google.maps.places.Autocomplete(
            document.getElementById('testtest'), {}
        );
</script>

当用户在服务器端发布表单时，我将得到一个文本值，例如

“五角大楼，北扶轮路，阿灵顿，弗吉尼亚州，大学”

等等。那么，在服务器端，有没有办法验证这个地址是否正确，即询问谷歌？

Answer 1

我不知道为什么它必须在服务器端。一旦谷歌进入，你就应该这样做。不要让他们提交表单并且必须重新做一遍，因为您想在服务器端进行验证。

HTML

<input type="text" id="address" onchange="doGeocode()" />

<!-- require Google Maps API -->
<script src="//maps.googleapis.com/maps/api/js"></script>

JS

function doGeocode() {
   var addr = document.getElementById("address");
   // Get geocoder instance
   var geocoder = new google.maps.Geocoder();
    
   // Geocode the address
   geocoder.geocode({
       'address': addr.value
   }, function(results, status) {
       if (status === google.maps.GeocoderStatus.OK && results.length > 0) {
    
           // set it to the correct, formatted address if it's valid
           addr.value = results[0].formatted_address;;
       } else {

          // show an error if it's not
          alert("Invalid address");
       }
   });
};

但是，如果您想使用 PHP，您可以尝试这个...

function geocode($address) {
    $return = array();
    $address = urlencode($address);
    $key = "put your key here,,,";
    $url = "https://maps.google.com/maps/api/geocode/json?key=$key&address={$address}";
    $resp_json = file_get_contents($url);
    $resp = json_decode($resp_json, true);

    if ($resp['status']!=='OK') return false;

    foreach($resp['results'] as $res) {
        $loc = array(
            "zipcode"=>null,
            "formatted"=>null
        );

        foreach ($res['address_components'] as $comp) {
            if (in_array("postal_code", $comp['types'])) 
                $loc['zipcode'] = $comp['short_name'];
        }

        $loc['formatted'] = $res['formatted_address'];
        $loc['lng'] = $res['geometry']['location']['lng'];
        $loc['lat'] = $res['geometry']['location']['lat'];
        $return[] = $loc;
    }

    return $return;
}