使用PHP解码JSON并格式化父/子结构？_Php_Json

使用PHP解码JSON并格式化父/子结构？

php json

使用PHP解码JSON并格式化父/子结构？,php,json,Php,Json,我从外部站点获得了以下JSON输出： { "foo":"bar", "poo":1, "boo":67, "articles":{ "1329800400":[ { "id":"234", "title":"Title of This Article", "url":"http:\/\/www.tes

我从外部站点获得了以下JSON输出：

{ "foo":"bar", "poo":1, "boo":67, "articles":{ "1329800400":[ { "id":"234", "title":"Title of This Article", "url":"http:\/\/www.test.com\/path-to-article.html", "thumb":"http:\/\/www.test.com\/path-to-image.jpg", "attachment":"http:\/\/www.test.com\/path-to-attachment.mp3", "duration":"287.3200", }, { "id":"212", "title":"Another Article Title", "url":"http:\/\/www.test.com\/path-to-article.html", "thumb":"http:\/\/www.test.com\/path-to-image.jpg", "attachment":"http:\/\/www.test.com\/path-to-attachment.mp3", "duration":"199.0530", }, { "id":"196", "title":"A Third Article Title", "url":"http:\/\/www.test.com\/path-to-article.html", "thumb":"http:\/\/www.test.com\/path-to-image.jpg", "attachment":"http:\/\/www.test.com\/path-to-attachment.mp3", "duration":"217.0250", } ], "1329714000":[ { "id":"176", "title":"Yet Another Article Title", "url":"http:\/\/www.test.com\/path-to-article.html", "thumb":"http:\/\/www.test.com\/path-to-image.jpg", "attachment":"http:\/\/www.test.com\/path-to-attachment.mp3", "duration":"219.6890", }, { "id":"155", "title":"The Last Article Title", "url":"http:\/\/www.test.com\/path-to-article.html", "thumb":"http:\/\/www.test.com\/path-to-image.jpg", "attachment":"http:\/\/www.test.com\/path-to-attachment.mp3", "duration":"228.2570", } ] } } { “foo”：“bar”， "公安条例":一,， “boo”：67， “条款”：{ "1329800400":[ { “id”：“234”， “标题”：“本文标题”， “url:“http:\/\/www.test.com\/path to article.html”， “thumb”：“http:\/\/www.test.com\/path to image.jpg”， “附件”：“http:\/\/www.test.com\/path to attachment.mp3”， “持续时间”：“287.3200”， }, { “id”：“212”， “标题”：“另一篇文章标题”， “url:“http:\/\/www.test.com\/path to article.html”， “thumb”：“http:\/\/www.test.com\/path to image.jpg”， “附件”：“http:\/\/www.test.com\/path to attachment.mp3”， “持续时间”：“199.0530”， }, { “id”：“196”， “标题”：“第三篇文章标题”， “url:“http:\/\/www.test.com\/path to article.html”， “thumb”：“http:\/\/www.test.com\/path to image.jpg”， “附件”：“http:\/\/www.test.com\/path to attachment.mp3”， “持续时间”：“217.0250”， } ], "1329714000":[ { “id”：“176”， “标题”：“另一篇文章标题”， “url:“http:\/\/www.test.com\/path to article.html”， “thumb”：“http:\/\/www.test.com\/path to image.jpg”， “附件”：“http:\/\/www.test.com\/path to attachment.mp3”， “期限”：“219.6890”， }, { “id”：“155”， “标题”：“最后一篇文章的标题”， “url:“http:\/\/www.test.com\/path to article.html”， “thumb”：“http:\/\/www.test.com\/path to image.jpg”， “附件”：“http:\/\/www.test.com\/path to attachment.mp3”， “持续时间”：“228.2570”， } ] } } 我想通过PHP获取文件，并将结构重新格式化为：

{ "1": { "id":"234", "title":"Title of This Article", "url":"http:\/\/www.test.com\/path-to-article.html", "thumb":"http:\/\/www.test.com\/path-to-image.jpg", "attachment":"http:\/\/www.test.com\/path-to-attachment.mp3", "duration":"287.3200", "pubDate":"1329800400" }, "2": { "id":"212", "title":"Another Article Title", "url":"http:\/\/www.test.com\/path-to-article.html", "thumb":"http:\/\/www.test.com\/path-to-image.jpg", "attachment":"http:\/\/www.test.com\/path-to-attachment.mp3", "duration":"199.0530", "pubDate":"1329800400" }, "3": { "id":"196", "title":"A Third Article Title", "url":"http:\/\/www.test.com\/path-to-article.html", "thumb":"http:\/\/www.test.com\/path-to-image.jpg", "attachment":"http:\/\/www.test.com\/path-to-attachment.mp3", "duration":"217.0250", "pubDate":"1329800400" }, "4": { "id":"176", "title":"Yet Another Article Title", "url":"http:\/\/www.test.com\/path-to-article.html", "thumb":"http:\/\/www.test.com\/path-to-image.jpg", "attachment":"http:\/\/www.test.com\/path-to-attachment.mp3", "duration":"219.6890", "pubDate":"1329714000" }, "5": { "id":"155", "title":"The Last Article Title", "url":"http:\/\/www.test.com\/path-to-article.html", "thumb":"http:\/\/www.test.com\/path-to-image.jpg", "attachment":"http:\/\/www.test.com\/path-to-attachment.mp3", "duration":"228.2570", "pubDate":"1329714000" } } { "1": { “id”：“234”， “标题”：“本文标题”， “url:“http:\/\/www.test.com\/path to article.html”， “thumb”：“http:\/\/www.test.com\/path to image.jpg”， “附件”：“http:\/\/www.test.com\/path to attachment.mp3”， “持续时间”：“287.3200”， “发布日期”：“1329800400” }, "2": { “id”：“212”， “标题”：“另一篇文章标题”， “url:“http:\/\/www.test.com\/path to article.html”， “thumb”：“http:\/\/www.test.com\/path to image.jpg”， “附件”：“http:\/\/www.test.com\/path to attachment.mp3”， “持续时间”：“199.0530”， “发布日期”：“1329800400” }, "3": { “id”：“196”， “标题”：“第三篇文章标题”， “url:“http:\/\/www.test.com\/path to article.html”， “thumb”：“http:\/\/www.test.com\/path to image.jpg”， “附件”：“http:\/\/www.test.com\/path to attachment.mp3”， “持续时间”：“217.0250”， “发布日期”：“1329800400” }, "4": { “id”：“176”， “标题”：“另一篇文章标题”， “url:“http:\/\/www.test.com\/path to article.html”， “thumb”：“http:\/\/www.test.com\/path to image.jpg”， “附件”：“http:\/\/www.test.com\/path to attachment.mp3”， “期限”：“219.6890”， “发布日期”：“1329714000” }, "5": { “id”：“155”， “标题”：“最后一篇文章的标题”， “url:“http:\/\/www.test.com\/path to article.html”， “thumb”：“http:\/\/www.test.com\/path to image.jpg”， “附件”：“http:\/\/www.test.com\/path to attachment.mp3”， “持续时间”：“228.2570”， “发布日期”：“1329714000” } }

这有多难？请注意pubDate是如何从父对象变成子对象的。还要记住，我永远不会知道pubDates的值——它们每天都在变化。提前感谢您的建议

开始的JSON字符串有一个问题，因为它在

duration

属性之后有尾随逗号，这些属性无效。因此，首先，需要删除那些尾随的逗号

$jsondata= json_decode($filedata); //Filedata contains your JSON
$reformat = $jsondata['articles'];  //Get only the articles section
$tmp = array(); //Temporary array to store the new JSON data
$i=0; //Create a counter and start at 0

foreach($reformat as $item=>$pubdate_unixtime) {
    $i++;  //Add 1 to the counter
    $item["pubDate"] = $pubdate_unixtime; //Add the pubdate to the array
    $tmp[$i] = $item; //Add the old array to a new one and change the key
}

echo json_encode($tmp); //Change the php to json

// Function lifted from PHP docs...
function removeTrailingCommas($json) {
   $json=preg_replace('/,\s*([\]}])/m', '$1', $json);
    return $json;
}

articles

是具有数字属性名称的对象，因此需要使用

get\u object\u vars（）

检索这些对象，以便轻松地进行编辑

// Get rid of trailing commas
$json = json = removeTrailingCommas($json);

// Decode your string (already in $json)
$obj = json_decode($json);

// Get the article dates as an array
$articles = (get_object_vars($obj->articles));

// This will be the final output object
$output = new stdClass();
// Since they will be numeric properties starting at 1...
$outkey = 1;
// Loops over article pubdates to get the outer objects
foreach ($articles as $key=>$val) {
  // Loops over the inner objects in each article pubdate
  foreach ($obj->articles->$key as $sub_obj) {

    // Copies the object and adds the pubdate property
    $tmp = clone $sub_obj;
    $tmp->pubDate = $key;

    // Add it onto the output object
    $output->$outkey = $tmp;
    $outkey++;
  }
}
//var_dump($output);
echo json_encode($output);

PHP对象转储： JSON字符串：

嗯，这似乎不是我想要的。我需要一个与示例中给出的格式完全相同的输出。注意它是如何简化的。在尝试了你的代码之后，我得到了NULL的返回值。很抱歉我的速度太慢了——我对PHP非常陌生！对不起，我只是有点困惑，你已经移动了发布日期，但是其他的斜杠更改是有意的吗？您的输出不是有效的json，因为它是现在的。我完全更改了它。现在重试吗？对不起，使用斜杠进行的更改不是有意的。我修复了这个操作。尝试了你的新代码，我得到了以下错误：“警告：在json2.php的第11行[]上为foreach（）提供的参数无效”-第11行是“foreach（$item=>$pubdate\u unixtime）{”+1这个答案感觉比我自己的答案彻底得多，而且总体上比我自己的答案好得多-我确实说过我对php很生疏；）

object(stdClass)#8 (5) {
  ["0"]=>
  object(stdClass)#9 (7) {
    ["id"]=>
    string(3) "234"
    ["title"]=>
    string(21) "Title of This Article"
    ["url"]=>
    string(40) "http://www.test.com/path-to-article.html"
    ["thumb"]=>
    string(37) "http://www.test.com/path-to-image.jpg"
    ["attachment"]=>
    string(42) "http://www.test.com/path-to-attachment.mp3"
    ["duration"]=>
    string(8) "287.3200"
    ["pubDate"]=>
    int(1329800400)
  }
  ["1"]=>
  object(stdClass)#10 (7) {
    ["id"]=>
    string(3) "212"
    ["title"]=>
    string(21) "Another Article Title"
    ["url"]=>
    string(40) "http://www.test.com/path-to-article.html"
    ["thumb"]=>
    string(37) "http://www.test.com/path-to-image.jpg"
    ["attachment"]=>
    string(42) "http://www.test.com/path-to-attachment.mp3"
    ["duration"]=>
    string(8) "199.0530"
    ["pubDate"]=>
    int(1329800400)
  }
  ["2"]=>
  object(stdClass)#11 (7) {
    ["id"]=>
    string(3) "196"
    ["title"]=>
    string(21) "A Third Article Title"
    ["url"]=>
    string(40) "http://www.test.com/path-to-article.html"
    ["thumb"]=>
    string(37) "http://www.test.com/path-to-image.jpg"
    ["attachment"]=>
    string(42) "http://www.test.com/path-to-attachment.mp3"
    ["duration"]=>
    string(8) "217.0250"
    ["pubDate"]=>
    int(1329800400)
  }
  ["3"]=>
  object(stdClass)#12 (7) {
    ["id"]=>
    string(3) "176"
    ["title"]=>
    string(25) "Yet Another Article Title"
    ["url"]=>
    string(40) "http://www.test.com/path-to-article.html"
    ["thumb"]=>
    string(37) "http://www.test.com/path-to-image.jpg"
    ["attachment"]=>
    string(42) "http://www.test.com/path-to-attachment.mp3"
    ["duration"]=>
    string(8) "219.6890"
    ["pubDate"]=>
    int(1329714000)
  }
  ["4"]=>
  object(stdClass)#13 (7) {
    ["id"]=>
    string(3) "155"
    ["title"]=>
    string(22) "The Last Article Title"
    ["url"]=>
    string(40) "http://www.test.com/path-to-article.html"
    ["thumb"]=>
    string(37) "http://www.test.com/path-to-image.jpg"
    ["attachment"]=>
    string(42) "http://www.test.com/path-to-attachment.mp3"
    ["duration"]=>
    string(8) "228.2570"
    ["pubDate"]=>
    int(1329714000)
  }
}

{"0":
    {"id":"234",
     "title":"Title of This Article",
     "url":"http://www.test.com/path-to-article.html",
     "thumb":"http://www.test.com/path-to-image.jpg",
     "attachment":"http://www.test.com/path-to-attachment.mp3",
     "duration":"287.3200",
     "pubDate":1329800400},
 "1":
    {"id":"212",
     "title":"Another Article Title",
     "url":"http://www.test.com/path-to-article.html",
     "thumb":"http://www.test.com/path-to-image.jpg",
     "attachment":"http://www.test.com/path-to-attachment.mp3",
     "duration":"199.0530",
     "pubDate":1329800400},
 "2":
    {"id":"196",
     "title":"A Third Article Title",
     "url":"http://www.test.com/path-to-article.html",
     "thumb":"http://www.test.com/path-to-image.jpg",
     "attachment":"http://www.test.com/path-to-attachment.mp3",
     "duration":"217.0250",
     "pubDate":1329800400},
 "3":
    {"id":"176",
     "title":"Yet Another Article Title",
     "url":"http://www.test.com/path-to-article.html",
     "thumb":"http://www.test.com/path-to-image.jpg",
     "attachment":"http://www.test.com/path-to-attachment.mp3",
     "duration":"219.6890",
     "pubDate":1329714000},
 "4":
    {"id":"155",
     "title":"The Last Article Title",
     "url":"http://www.test.com/path-to-article.html",
     "thumb":"http://www.test.com/path-to-image.jpg",
     "attachment":"http://www.test.com/path-to-attachment.mp3",
     "duration":"228.2570",
     "pubDate":1329714000}
}