te')); return $arr; } /* 遍历用户所有主题 * @param $uid 用户ID * @param int $page 页数 * @param int $pagesize 每页记录条数 * @param bool $desc 排序方式 TRUE降序 FALSE升序 * @param string $key 返回的数组用那一列的值作为 key * @param array $col 查询哪些列 */ function thread_tid_find_by_uid($uid, $page = 1, $pagesize = 1000, $desc = TRUE, $key = 'tid', $col = array()) { if (empty($uid)) return array(); $orderby = TRUE == $desc ? -1 : 1; $arr = thread_tid__find($cond = array('uid' => $uid), array('tid' => $orderby), $page, $pagesize, $key, $col); return $arr; } // 遍历栏目下tid 支持数组 $fid = array(1,2,3) function thread_tid_find_by_fid($fid, $page = 1, $pagesize = 1000, $desc = TRUE) { if (empty($fid)) return array(); $orderby = TRUE == $desc ? -1 : 1; $arr = thread_tid__find($cond = array('fid' => $fid), array('tid' => $orderby), $page, $pagesize, 'tid', array('tid', 'verify_date')); return $arr; } function thread_tid_delete($tid) { if (empty($tid)) return FALSE; $r = thread_tid__delete(array('tid' => $tid)); return $r; } function thread_tid_count() { $n = thread_tid__count(); return $n; } // 统计用户主题数 大数量下严谨使用非主键统计 function thread_uid_count($uid) { $n = thread_tid__count(array('uid' => $uid)); return $n; } // 统计栏目主题数 大数量下严谨使用非主键统计 function thread_fid_count($fid) { $n = thread_tid__count(array('fid' => $fid)); return $n; } ?>javascript - How to retrieve data from json data - Stack Overflow

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    [{"id":7,"message":"This is another test message","taker_id":"131","giver_id":"102","status":"0","stamp":"2016-08-11"}]

    That's my response. I try to get a datum. I have tried data.id but it fails and returns undefined.

    [{"id":7,"message":"This is another test message","taker_id":"131","giver_id":"102","status":"0","stamp":"2016-08-11"}]

    That's my response. I try to get a datum. I have tried data.id but it fails and returns undefined.

    • javascript
    • json
    Share Improve this question edited Aug 11, 2016 at 15:10 Ram 145k16 gold badges172 silver badges200 bronze badges asked Aug 11, 2016 at 15:08 ROB ENGGROB ENGG 671 gold badge1 silver badge7 bronze badges 3
    • Sorry same try console.log(data[0].id); Undefined ?! – ROB ENGG Commented Aug 11, 2016 at 15:11
    • 2 My you have to use data = JSON.parse(data); first – JustOnUnderMillions Commented Aug 11, 2016 at 15:13
    • Possible duplicate of php get values from json encode – John Conde Commented Oct 1, 2016 at 19:30
    Add a ment  | 

    4 Answers 4

    Reset to default 8

    As I assume that you are working with a JSON string, you first have to parse the string into and JSON object. Else you couldn't reach any of the properties.

    parsedData = JSON.parse(data);

    Then you can get your property:

    parsedData[0].id

    This seems to work just fine

    var data = [{
  "id":7,
  "message":"This is another test message",
  "taker_id":"131",
  "giver_id":"102",
  "status":"0",
  "stamp":"2016-08-11"
}];
console.log(data[0].id);

    https://jsbin./jewatakize/

    if you just want to get the id from this one object then data[0].id will work just fine. If you expect to have multiple objects in that same array then you can use a loop. for example if this is angular you can do:

    <div ng-repeat='info in data'>
    <p>{{info.id}}</p>
</div>

    This will allow you to iterate through multiple objects within the array and get all id's.

    The problem here is that you have here an array of objects, and you are trying to access it without indexing. You should first parse it using and then access the object by indexing

    let objects = JSON.parse(data)
console.log(objects[0].id)

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