我研究了又研究，找不到答案。下面是我在调用 API 后得到的部分响应。{"api_version":"0.4","results": { "companies":[ { "company": { "name":"BILL, HILLARY \u0026 CHELSEA CLINTON FOUNDATION", "company_number":"EXTUID_4147727", "jurisdiction_code":"us_dc", "incorporation_date":"1997-10-23", "dissolution_date":"2014-11-20", "company_type":"Non-Profit Corporation", "registry_url":"https://corp.dcra.dc.gov/BizEntity.aspx/ViewEntityData?entityId=4147727", "branch":"F", "branch_status":"branch of an out-of-jurisdiction company", "inactive":true, "current_status":"Revoked", "created_at":"2015-12-04T13:32:35+00:00", "updated_at":"2018-01-16T16:14:02+00:00", "retrieved_at":"2016-03-14T00:40:43+00:00", "opencorporates_url":"https://opencorporates.com/companies/us_dc/EXTUID_4147727", "previous_names":[], "source": { "publisher":"District of Columbia Department of Consumer and Regulatory Affairs", "url":"https://corp.dcra.dc.gov/BizEntity.aspx/ViewEntityData?entityId=4147727", "retrieved_at":"2016-03-14T00:40:43+00:00"}, "registered_address": { "street_address":"1200 PRESIDENT CLINTON AVENUE,", "locality":"LITTLE ROCK", "region":"Arkansas", "postal_code":"72201", "country":"United States" }, } }, 下面是我的 PHP，我试图在其中检索、解析和显示 JSON 响应。以下是我在尝试解析时收到的两个错误。注意：未定义索引：公司在/opt/lampp/htdocs/OSINTTools.php 433行警告：为第 433 行的 /opt/lampp/htdocs/OSINTTools.php 中的 foreach() 提供的参数无效我想我收到这些错误是因为我没有正确访问这些值。有人能告诉我访问深度嵌套在这个 JSON 响应中的值的正确语法吗？提前致谢。PS 我知道这个问题以前有人问过。我用漂亮的搜索工具找过和我类似的问题，都没有用。
2 回答
翻阅古今
TA贡献1780条经验 获得超5个赞
Results 重复使用索引“company”，因此如果您试图直接使用它，将会混淆整个事情。我已经测试了以下内容，并且它有效：前提是该字符串的其余部分用缺少的括号关闭。
$string = '{
"api_version":"0.4",
"results":
{
"companies":[
{
"company":
{
"name":"BILL, HILLARY \u0026 CHELSEA CLINTON FOUNDATION",
"company_number":"EXTUID_4147727",
"jurisdiction_code":"us_dc",
"incorporation_date":"1997-10-23",
"dissolution_date":"2014-11-20",
"company_type":"Non-Profit Corporation",
"registry_url":"https://corp.dcra.dc.gov/BizEntity.aspx/ViewEntityData?entityId=4147727",
"branch":"F",
"branch_status":"branch of an out-of-jurisdiction company",
"inactive":true,
"current_status":"Revoked",
"created_at":"2015-12-04T13:32:35+00:00",
"updated_at":"2018-01-16T16:14:02+00:00",
"retrieved_at":"2016-03-14T00:40:43+00:00",
"opencorporates_url":"https://opencorporates.com/companies/us_dc/EXTUID_4147727",
"previous_names":[],
"source":
{
"publisher":"District of Columbia Department of Consumer and Regulatory Affairs",
"url":"https://corp.dcra.dc.gov/BizEntity.aspx/ViewEntityData?entityId=4147727",
"retrieved_at":"2016-03-14T00:40:43+00:00"},
"registered_address":
{
"street_address":"1200 PRESIDENT CLINTON AVENUE,",
"locality":"LITTLE ROCK",
"region":"Arkansas",
"postal_code":"72201",
"country":"United States"
},
"registered_address_in_full":"1200 PRESIDENT CLINTON AVENUE,, LITTLE ROCK, Arkansas, 72201",
"industry_codes":[],
"restricted_for_marketing":null,
"native_company_number":"N00005066161"
}
},
{
"company":
{
"name":"BILL, HILLARY \u0026 CHELSEA CLINTON FOUNDATION",
"company_number":"EXTUID_2698590",
"jurisdiction_code":"us_dc",
"incorporation_date":"2016-03-03",
"dissolution_date":null,
"company_type":"Non-Profit Corporation",
"registry_url":"https://corponline.dcra.dc.gov/BizEntity.aspx/ViewEntityData?entityId=2698590",
"branch":"F",
"branch_status":"branch of an out-of-jurisdiction company",
"inactive":false,
"current_status":"Active",
"created_at":"2015-12-08T12:22:52+00:00",
"updated_at":"2020-04-19T21:38:13+00:00",
"retrieved_at":"2020-04-19T17:55:36+00:00",
"opencorporates_url":"https://opencorporates.com/companies/us_dc/EXTUID_2698590",
"previous_names":[],
"source":
{
"publisher":"District of Columbia Department of Consumer and Regulatory Affairs",
"url":"https://corponline.dcra.dc.gov/BizEntity.aspx/ViewEntityData?entityId=2698590",
"retrieved_at":"2020-04-19T17:55:36+00:00"},
"registered_address":
{
"street_address":"1200 President Clinton Avenue,",
"locality":"LITTLE ROCK",
"region":"Arkansas",
"postal_code":"72201",
"country":"United States"
},
"registered_address_in_full":"1200 President Clinton Avenue,, LITTLE ROCK, Arkansas, 72201",
"industry_codes":[],
"restricted_for_marketing":null,
"native_company_number":"292233"
}
}]}}'; //missing brackets are added here
...
$json = json_decode($string);
$companies = $json->results->companies;
$output = "
<table>
<tr>
<th>Company Name</th>
<th>Incorporation Date</th>
<th>Dissolution Date</th>
<th>Company Type</th>
<th>Registry URL</th>
<th>Current Status</th>
<th>Address</th>
</tr>
";
foreach($companies as $company){
foreach($company as $data){
$output .= "<tr>";
$output .= "<td>".$data->name."<td>";
$output .= "<td>".$data->incorporation_date."<td>";
$output .= "<td>".$data->dissolution_date."<td>";
$output .= "<td>".$data->company_type."<td>";
$output .= "<td><a href='".$data->registry_url."'></a>Registry Link<td>";
$output .= "<td>".$data->current_status."<td>";
$output .= "<td>".$data->registered_address_in_full."<td>";
}
}
$output .= "</tr></table>";
echo $output;
隔江千里
TA贡献1906条经验 获得超10个赞
你的第二个错误是因为你的第一个错误。您的第一个错误是因为您试图在数据中循环太深的一个级别。
尝试这个：
foreach($json['results']['companies'] as $company_values){
$company = $company_values['company'];
$output .= "<tr>";
$output .= "<td>".$company['name']."<td>";
$output .= "<td>".$company['incorporation_date']."<td>";
$output .= "<td>".$company['dissolution_date']."<td>";
$output .= "<td>".$company['company_type']."<td>";
$output .= "<td><a href='".$company['registry_url']."'></a>Registry Link<td>";
$output .= "<td>".$company['current_status']."<td>";
$output .= "<td>".$company['registered_address_in_full']."<td>";
}
基本上，您的循环需要从高 1 级开始，并且在循环内您可以从键中提取值company。
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