来自JSON的PHP数组如果只有一个结果，则不同

Question

我正在使用澳大利亚邮政邮编loookup API，它会返回JSON响应。

如果我要寻找的3094，它返回

Array 
(
    [localities] => Array 
     (
      [locality] => Array 
       (
        [category] => Delivery Area 
        [id] => 5588 
        [latitude] => -37.717549 
        [location] => MONTMORENCY 
        [longitude] => 145.121028 
        [postcode] => 3094 
        [state] => VIC 
       ) 

     ) 

) 

但是，如果我寻找的是有一个以上的郊区（位置）相关联的邮政编码，如3084，我得到

Array 
(
    [localities] => Array 
     (
      [locality] => Array 
       (
        [0] => Array 
         (
          [category] => Delivery Area 
          [id] => 5574 
          [latitude] => -37.739262 
          [location] => VIEWBANK 
          [longitude] => 145.096424 
          [postcode] => 3084 
          [state] => VIC 
         ) 

        [1] => Array 
         (
          [category] => Delivery Area 
          [id] => 5572 
          [latitude] => -37.756341 
          [location] => HEIDELBERG 
          [longitude] => 145.067145 
          [postcode] => 3084 
          [state] => VIC 
         ) 

        [2] => Array 
         (
          [category] => Delivery Area 
          [id] => 5573 
          [latitude] => -37.742893 
          [location] => ROSANNA 
          [longitude] => 145.065044 
          [postcode] => 3084 
          [state] => VIC 
         ) 

        [3] => Array 
         (
          [category] => Delivery Area 
          [id] => 5570 
          [latitude] => -37.7442195 
          [location] => BANYULE 
          [longitude] => 145.08793 
          [postcode] => 3084 
          [state] => VIC 
         ) 

        [4] => Array 
         (
          [category] => Delivery Area 
          [id] => 5571 
          [latitude] => -37.762519 
          [location] => EAGLEMONT 
          [longitude] => 145.068208 
          [postcode] => 3084 
          [state] => VIC 
         ) 

       ) 

     ) 

) 

现在，通过

$ch = curl_init(); 
curl_setopt($ch, CURLOPT_RETURNTRANSFER,1); 
curl_setopt($ch, CURLOPT_URL, $api_search_url); 
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false); 
curl_setopt($ch, CURLOPT_HTTPHEADER, array(
    'Auth-Key: ' . $authKey 
)); 

$response = curl_exec($ch); 
curl_close($ch); 
$json_dec = json_decode($response,true); 

解码后，我可以做一个foreach循环就像

echo '<ul id="pcode_results" style="list-style:none;text-align:left;padding:10px;">'; 

foreach($json_dec['localities'] as $locality){ 
     echo '<li class="pcode_res" style="cursor:pointer;" id="' . $locality['postcode'] . ',' . $locality['location'] . ',' . $locality['state'] . '">' . $locality['postcode'] . ', ' . $locality['location'] . ', ' . $locality['state'] . '</li>'; 
    } 

echo '</ul>'; 

，它似乎工作时，有一个结果，如3094，而不是当有像3084

多个结果我本来就具有JSON解码作为一个对象数组，并做$ locality- >邮政编码将工作，但只有当有超过1个结果。

我哪里错了？它需要能够处理数组结构不同的两种情况（1个结果或多于1个）。

谢谢。

Answer 1

如果你看看结果集，你会发现一些细节，当只有一个选项可用时，api只返回一个地点，当有多个选项可用时，它返回一组地点。

当等级4返回多个时局部性细节它返回结果只有一个局部性细节在3级，但是。

if (isset($json_dec['localities']['locality']['category'])) { 
    // It means it returned a single result set, If details in Level 3 it is a single result 
    $locality = $json_dec['localities']['locality']; 
    echo '<li class="pcode_res" style="cursor:pointer;" id="' . $locality['postcode'] . ',' . $locality['location'] . ',' . $locality['state'] . '">' . $locality['postcode'] . ', ' . $locality['location'] . ', ' . $locality['state'] . '</li>'; 
} else { 
    foreach ($json_dec['localities']['locality'] as $locality) { 
     echo '<li class="pcode_res" style="cursor:pointer;" id="' . $locality['postcode'] . ',' . $locality['location'] . ',' . $locality['state'] . '">' . $locality['postcode'] . ', ' . $locality['location'] . ', ' . $locality['state'] . '</li>'; 
    } 
} 

Answer 2

请试试这个代码：

foreach($json_dec['locality'] as $locality) 
{ 
    echo '<li class="pcode_res" style="cursor:pointer;" id="' . $locality['postcode'] . ',' . $locality['location'] . ',' . $locality['state'] . '">' . $locality['postcode'] . ', ' . $locality['location'] . ', ' . $locality['state'] . '</li>'; 
} 

谢谢...

Answer 3

您可以使用is_array检查其数组：

foreach($json_dec['localities']['locality'] as $key => $value){ 
    if (is_array($value)) { 
     foreach ($value as $locality) { 
      echo '<li class="pcode_res" style="cursor:pointer;" id="' . $locality['postcode'] . ',' . $locality['location'] . ',' . $locality['state'] . '">' . $locality['postcode'] . ', ' . $locality['location'] . ', ' . $locality['state'] . '</li>'; 
     } 
    } else { 
     echo '<li class="pcode_res" style="cursor:pointer;" id="' . $value['postcode'] . ',' . $value['location'] . ',' . $value['state'] . '">' . $value['postcode'] . ', ' . $value['location'] . ', ' . $value['state'] . '</li>'; 
    } 
} 

Answer 4

使用此代码来访问所有的数组元素：

foreach($json_dec['localities']['locality'] as $locality){ 

    echo '<li class="pcode_res" style="cursor:pointer;" id="' .$locality['postcode'] . ',' . $locality['location'] . ',' . $locality['state'] . '">' . $locality['postcode'] . ', ' . $locality['location'] . ', ' . $locality['state'] . '</li>'; 

}