Question

我正在尝试导入JSON文件，读取它然后输出结果。我对获得JSON密钥等感到困惑。

这是JSON文件的摘录：

{
  "CVE_data_type" : "CVE",
  "CVE_data_format" : "MITRE",
  "CVE_data_version" : "4.0",
  "CVE_data_numberOfCVEs" : "566",
  "CVE_data_timestamp" : "2017-07-26T10:00Z",
  "CVE_Items" : [ {
    "cve" : {
      "CVE_data_meta" : {
        "ID" : "CVE-2010-1154"
      },
      "affects" : {
        "vendor" : {
          "vendor_data" : [ ]
        }
      },
      "problemtype" : {
        "problemtype_data" : [ {
          "description" : [ ]
        } ]
      },
      "references" : {
        "reference_data" : [ ]
      },
      "description" : {
        "description_data" : [ {
          "lang" : "en",
          "value" : "** REJECT **  DO NOT USE THIS CANDIDATE NUMBER.  ConsultIDs: none.  Reason: This candidate was in a CNA pool that was not assigned to any issues during 2010.  Notes: none."
        } ]
      }
    },
    "configurations" : {
      "CVE_data_version" : "4.0",
      "nodes" : [ ]
    },
    "impact" : { },
    "publishedDate" : "2017-07-24T16:29Z",
    "lastModifiedDate" : "2017-07-24T16:29Z"
  }, {
    "cve" : {
      "CVE_data_meta" : {
        "ID" : "CVE-2010-1430"
      },
      "affects" : {
        "vendor" : {
          "vendor_data" : [ ]
        }
      },
      "problemtype" : {
        "problemtype_data" : [ {
          "description" : [ ]
        } ]
      },
      "references" : {
        "reference_data" : [ ]
      },
      "description" : {
        "description_data" : [ {
          "lang" : "en",
          "value" : "** REJECT **  DO NOT USE THIS CANDIDATE NUMBER.  ConsultIDs: none.  Reason: This candidate was in a CNA pool that was not assigned to any issues during 2010.  Notes: none."
        } ]
      }
    },
    "configurations" : {
      "CVE_data_version" : "4.0",
      "nodes" : [ ]
    },
    "impact" : { },
    "publishedDate" : "2017-07-24T16:29Z",
    "lastModifiedDate" : "2017-07-24T16:29Z"
  }, {
    "cve" : {
      "CVE_data_meta" : {
        "ID" : "CVE-2010-1631"
      },
      "affects" : {
        "vendor" : {
          "vendor_data" : [ ]
        }
      },
      "problemtype" : {
        "problemtype_data" : [ {
          "description" : [ ]
        } ]
      },
      "references" : {
        "reference_data" : [ ]
      },
      "description" : {
        "description_data" : [ {
          "lang" : "en",
          "value" : "** REJECT **  DO NOT USE THIS CANDIDATE NUMBER.  ConsultIDs: none.  Reason: This candidate was in a CNA pool that was not assigned to any issues during 2010.  Notes: none."
        } ]
      }
    },
    "configurations" : {
      "CVE_data_version" : "4.0",
      "nodes" : [ ]
    },
    "impact" : { },
    "publishedDate" : "2017-07-24T16:29Z",
    "lastModifiedDate" : "2017-07-24T16:29Z"
  },

我的PHP文件如下：

<?php
    //Load the JSON feed
    $file = 'nvdcve-1.0-recent.json';
    $json = file_get_contents($file);
    $json_data = json_decode($json, true);
    $vulns = $json_data->CVE_Items[0];

    //Check if JSON file is actually found.
    if (file_exists($file)) {
    echo "The file $file exists";
    } else {
    echo "The file $file does not exist";
    }

    //echo '<pre>' . var_dump($json_datas) . '</pre>';

    //Loop through items and display
    foreach ($vulns as $vuln) {
        $cveid = $vuln->cve->CVE_data_meta->ID;
        echo $cveid . '<br>';
     }

    //Print the array - Debugging only.
    //print_r($json_datas);

 ?>

这个PHP仅用于测试，最终，我需要循环并回显所有不同的部分，以创建完整的条目，如ID，影响，问题类型，引用等......

我以前从未在PHP上使用JSON，今天我读了很多文章，每个人都告诉我一个不同的方式，这让我头疼！

Answer 1

你的json无效。这就是json_decode（$ json）返回NULL的原因。在这里查看json https://jsonformatter.curiousconcept.com/

更新

<?php
$file = 'nvdcve-1.0-recent.json';
$json = file_get_contents($file);
$json_data = json_decode($json);
$vulns = $json_data->CVE_Items;

if (file_exists($file)) {
    echo "The file $file exists";
} else {
    echo "The file $file does not exist";
}
foreach ($vulns as $vuln) {
    $cveid = $vuln->cve->CVE_data_meta->ID;
    echo $cveid; echo '<br>';
}


?>

PHP读取JSON文件并输出

1 个答案: