如果Geocoder返回多个结果，则PHP脚本无法解析由Google Maps Geocoder API返回的JSON

我有一个PHP脚本，它试图读取和解析从Google Geocoder API返回的JSON字符串。该脚本适用于大多数地址，但在几次Google地理编码器API返回给定地址的多个结果时会遇到麻烦。如果Geocoder返回多个结果，则PHP脚本无法解析由Google Maps Geocoder API返回的JSON

这是我的代码：

$mGeoFile = fopen("http://maps.googleapis.com/maps/api/geocode/json?address=" . str_replace(" ", "+", $mAddress0) . "&sensor=false", "r");  
$mGeoFileJSON = fread($mGeoFile, 10000); 
fclose($mGeoFile); 
$mGeocode_array = json_decode($mGeoFileJSON, true); 

var_dump($mGeocode_array); 
echo "<br />"; 
var_dump($mGeocode_array['results'][0]['geometry']['location']);

此打印为 “115板栗街厄普顿，MA”（在$ mAddress0通过）：

array(2) { ["status"]=> string(2) "OK" ["results"]=> array(1) { [0]=> array(4) { ["types"]=> array(1) { [0]=> string(14) "street_address" } ["formatted_address"]=> string(37) "115 Chestnut St, Upton, MA 01568, USA" ["address_components"]=> array(8) { [0]=> array(3) { ["long_name"]=> string(3) "115" ["short_name"]=> string(3) "115" ["types"]=> array(1) { [0]=> string(13) "street_number" } } [1]=> array(3) { ["long_name"]=> string(11) "Chestnut St" ["short_name"]=> string(11) "Chestnut St" ["types"]=> array(1) { [0]=> string(5) "route" } } [2]=> array(3) { ["long_name"]=> string(5) "Upton" ["short_name"]=> string(5) "Upton" ["types"]=> array(2) { [0]=> string(8) "locality" [1]=> string(9) "political" } } [3]=> array(3) { ["long_name"]=> string(5) "Upton" ["short_name"]=> string(5) "Upton" ["types"]=> array(2) { [0]=> string(27) "administrative_area_level_3" [1]=> string(9) "political" } } [4]=> array(3) { ["long_name"]=> string(9) "Worcester" ["short_name"]=> string(9) "Worcester" ["types"]=> array(2) { [0]=> string(27) "administrative_area_level_2" [1]=> string(9) "political" } } [5]=> array(3) { ["long_name"]=> string(13) "Massachusetts" ["short_name"]=> string(2) "MA" ["types"]=> array(2) { [0]=> string(27) "administrative_area_level_1" [1]=> string(9) "political" } } [6]=> array(3) { ["long_name"]=> string(13) "United States" ["short_name"]=> string(2) "US" ["types"]=> array(2) { [0]=> string(7) "country" [1]=> string(9) "political" } } [7]=> array(3) { ["long_name"]=> string(5) "01568" ["short_name"]=> string(5) "01568" ["types"]=> array(1) { [0]=> string(11) "postal_code" } } } ["geometry"]=> array(4) { ["location"]=> array(2) { ["lat"]=> float(42.1476896) ["lng"]=> float(-71.5863099) } ["location_type"]=> string(18) "RANGE_INTERPOLATED" ["viewport"]=> array(2) { ["southwest"]=> array(2) { ["lat"]=> float(42.1445379) ["lng"]=> float(-71.5894495) } ["northeast"]=> array(2) { ["lat"]=> float(42.1508332) ["lng"]=> float(-71.5831542) } } ["bounds"]=> array(2) { ["southwest"]=> array(2) { ["lat"]=> float(42.1476815) ["lng"]=> float(-71.5863099) } ["northeast"]=> array(2) { ["lat"]=> float(42.1476896) ["lng"]=> float(-71.5862938) } } } } } } 
array(2) { ["lat"]=> float(42.1476896) ["lng"]=> float(-71.5863099) }

另外，地理编码器返回以下JSON字符串for“115 Chestnut Street Upton，MA”

{ 
    "status": "OK", 
    "results": [ { 
    "types": [ "street_address" ], 
    "formatted_address": "115 Chestnut St, Upton, MA 01568, USA", 
    "address_components": [ { 
     "long_name": "115", 
     "short_name": "115", 
     "types": [ "street_number" ] 
    }, { 
     "long_name": "Chestnut St", 
     "short_name": "Chestnut St", 
     "types": [ "route" ] 
    }, { 
     "long_name": "Upton", 
     "short_name": "Upton", 
     "types": [ "locality", "political" ] 
    }, { 
     "long_name": "Upton", 
     "short_name": "Upton", 
     "types": [ "administrative_area_level_3", "political" ] 
    }, { 
     "long_name": "Worcester", 
     "short_name": "Worcester", 
     "types": [ "administrative_area_level_2", "political" ] 
    }, { 
     "long_name": "Massachusetts", 
     "short_name": "MA", 
     "types": [ "administrative_area_level_1", "political" ] 
    }, { 
     "long_name": "United States", 
     "short_name": "US", 
     "types": [ "country", "political" ] 
    }, { 
     "long_name": "01568", 
     "short_name": "01568", 
     "types": [ "postal_code" ] 
    } ], 
    "geometry": { 
     "location": { 
     "lat": 42.1476896, 
     "lng": -71.5863099 
     }, 
     "location_type": "RANGE_INTERPOLATED", 
     "viewport": { 
     "southwest": { 
      "lat": 42.1445379, 
      "lng": -71.5894495 
     }, 
     "northeast": { 
      "lat": 42.1508332, 
      "lng": -71.5831542 
     } 
     }, 
     "bounds": { 
     "southwest": { 
      "lat": 42.1476815, 
      "lng": -71.5863099 
     }, 
     "northeast": { 
      "lat": 42.1476896, 
      "lng": -71.5862938 
     } 
     } 
    } 
    } ] 
}

我碰到一个地址这样的问题第50富兰克林街波士顿针对谷歌的地理编码API返回：

{ 
    "status": "OK", 
    "results": [ { 
    "types": [ "street_address" ], 
    "formatted_address": "50 Franklin St, Boston, MA 02110, USA", 
    "address_components": [ { 
     "long_name": "50", 
     "short_name": "50", 
     "types": [ "street_number" ] 
    }, { 
     "long_name": "Franklin St", 
     "short_name": "Franklin St", 
     "types": [ "route" ] 
    }, { 
     "long_name": "Boston", 
     "short_name": "Boston", 
     "types": [ "locality", "political" ] 
    }, { 
     "long_name": "Boston", 
     "short_name": "Boston", 
     "types": [ "administrative_area_level_3", "political" ] 
    }, { 
     "long_name": "Suffolk", 
     "short_name": "Suffolk", 
     "types": [ "administrative_area_level_2", "political" ] 
    }, { 
     "long_name": "Massachusetts", 
     "short_name": "MA", 
     "types": [ "administrative_area_level_1", "political" ] 
    }, { 
     "long_name": "United States", 
     "short_name": "US", 
     "types": [ "country", "political" ] 
    }, { 
     "long_name": "02110", 
     "short_name": "02110", 
     "types": [ "postal_code" ] 
    } ], 
    "geometry": { 
     "location": { 
     "lat": 42.3556540, 
     "lng": -71.0585261 
     }, 
     "location_type": "ROOFTOP", 
     "viewport": { 
     "southwest": { 
      "lat": 42.3525064, 
      "lng": -71.0616737 
     }, 
     "northeast": { 
      "lat": 42.3588016, 
      "lng": -71.0553785 
     } 
     } 
    } 
    }, { 
    "types": [ "street_address" ], 
    "formatted_address": "50 Franklin St, Boston, MA 02122, USA", 
    "address_components": [ { 
     "long_name": "50", 
     "short_name": "50", 
     "types": [ "street_number" ] 
    }, { 
     "long_name": "Franklin St", 
     "short_name": "Franklin St", 
     "types": [ "route" ] 
    }, { 
     "long_name": "Boston", 
     "short_name": "Boston", 
     "types": [ "locality", "political" ] 
    }, { 
     "long_name": "Boston", 
     "short_name": "Boston", 
     "types": [ "administrative_area_level_3", "political" ] 
    }, { 
     "long_name": "Suffolk", 
     "short_name": "Suffolk", 
     "types": [ "administrative_area_level_2", "political" ] 
    }, { 
     "long_name": "Massachusetts", 
     "short_name": "MA", 
     "types": [ "administrative_area_level_1", "political" ] 
    }, { 
     "long_name": "United States", 
     "short_name": "US", 
     "types": [ "country", "political" ] 
    }, { 
     "long_name": "02122", 
     "short_name": "02122", 
     "types": [ "postal_code" ] 
    } ], 
    "geometry": { 
     "location": { 
     "lat": 42.2871370, 
     "lng": -71.0400105 
     }, 
     "location_type": "ROOFTOP", 
     "viewport": { 
     "southwest": { 
      "lat": 42.2839894, 
      "lng": -71.0431581 
     }, 
     "northeast": { 
      "lat": 42.2902846, 
      "lng": -71.0368629 
     } 
     } 
    } 
    }, { 
    "types": [ "street_address" ], 
    "formatted_address": "50 Franklin St, Boston, MA 02129, USA", 
    "address_components": [ { 
     "long_name": "50", 
     "short_name": "50", 
     "types": [ "street_number" ] 
    }, { 
     "long_name": "Franklin St", 
     "short_name": "Franklin St", 
     "types": [ "route" ] 
    }, { 
     "long_name": "Boston", 
     "short_name": "Boston", 
     "types": [ "locality", "political" ] 
    }, { 
     "long_name": "Boston", 
     "short_name": "Boston", 
     "types": [ "administrative_area_level_3", "political" ] 
    }, { 
     "long_name": "Suffolk", 
     "short_name": "Suffolk", 
     "types": [ "administrative_area_level_2", "political" ] 
    }, { 
     "long_name": "Massachusetts", 
     "short_name": "MA", 
     "types": [ "administrative_area_level_1", "political" ] 
    }, { 
     "long_name": "United States", 
     "short_name": "US", 
     "types": [ "country", "political" ] 
    }, { 
     "long_name": "02129", 
     "short_name": "02129", 
     "types": [ "postal_code" ] 
    } ], 
    "geometry": { 
     "location": { 
     "lat": 42.3785674, 
     "lng": -71.0668132 
     }, 
     "location_type": "RANGE_INTERPOLATED", 
     "viewport": { 
     "southwest": { 
      "lat": 42.3754150, 
      "lng": -71.0699535 
     }, 
     "northeast": { 
      "lat": 42.3817103, 
      "lng": -71.0636583 
     } 
     }, 
     "bounds": { 
     "southwest": { 
      "lat": 42.3785579, 
      "lng": -71.0668132 
     }, 
     "northeast": { 
      "lat": 42.3785674, 
      "lng": -71.0667986 
     } 
     } 
    } 
    }, { 
    "types": [ "street_address" ], 
    "formatted_address": "50 Franklin St, Boston, MA 02136, USA", 
    "address_components": [ { 
     "long_name": "50", 
     "short_name": "50", 
     "types": [ "street_number" ] 
    }, { 
     "long_name": "Franklin St", 
     "short_name": "Franklin St", 
     "types": [ "route" ] 
    }, { 
     "long_name": "Boston", 
     "short_name": "Boston", 
     "types": [ "locality", "political" ] 
    }, { 
     "long_name": "Boston", 
     "short_name": "Boston", 
     "types": [ "administrative_area_level_3", "political" ] 
    }, { 
     "long_name": "Suffolk", 
     "short_name": "Suffolk", 
     "types": [ "administrative_area_level_2", "political" ] 
    }, { 
     "long_name": "Massachusetts", 
     "short_name": "MA", 
     "types": [ "administrative_area_level_1", "political" ] 
    }, { 
     "long_name": "United States", 
     "short_name": "US", 
     "types": [ "country", "political" ] 
    }, { 
     "long_name": "02136", 
     "short_name": "02136", 
     "types": [ "postal_code" ] 
    } ], 
    "geometry": { 
     "location": { 
     "lat": 42.2526044, 
     "lng": -71.1332635 
     }, 
     "location_type": "RANGE_INTERPOLATED", 
     "viewport": { 
     "southwest": { 
      "lat": 42.2494625, 
      "lng": -71.1364052 
     }, 
     "northeast": { 
      "lat": 42.2557577, 
      "lng": -71.1301100 
     } 
     }, 
     "bounds": { 
     "southwest": { 
      "lat": 42.2526044, 
      "lng": -71.1332635 
     }, 
     "northeast": { 
      "lat": 42.2526158, 
      "lng": -71.1332517 
     } 
     } 
    }, 
    "partial_match": true 
    } ] 
}

我的脚本返回：

NULL 
NULL

任何想法可能什么呢？谢谢！

来源

2011-02-02 Casey Flynn

响应超过10k个字符的可能性很大，在这种情况下，您尝试解码无效的JSON字符串。确保在解码之前您正在读取整个流。最简单的方法是使用file_get_contents而不是fopen/fread/fclose。从长远来看，你应该转向卷曲。

来源

2011-02-02 19:31:45 Maerlyn

感谢@Maerlyn，我实际上将文件大小设置为1,000,000，因为我认为它可能不会超过这个长度。但是这个建议很有效。 :) – 2011-02-02 19:47:59

对我来说，你的字符串完美解码。也许响应以UTF-8编码，并在字符串中存在B.O.M（字节顺序标记）字符。在这种情况下，字符串不正确的是JSON格式结构（请参见RFC 4627）。

在他的位置，我会再写几行来看看是否是这个问题。可以通过字符串去除包装CCC inna的B.O.M字符。这个函数递归地调用：

function removeBOM($str=""){ 
     if(substr($str, 0,3) == pack("CCC",0xef,0xbb,0xbf)) { 
       $str=substr($str, 3); 
     } 
     return $str; 
}

来源

2011-02-02 20:07:36

如果Geocoder返回多个结果，则PHP脚本无法解析由Google Maps Geocoder API返回的JSON

回答

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