从PHP

Question

我想从PHP中的JSON表创建另一个JSON对象。这是我的JSON对象。我想将所有相同的帐户分组到一个数组中。

$ entry_titles是

[
  {
    "account": "A",
    "month": 2016-01,
    "amount": 5000
  }, 
  {
    "account": "A",
    "month": 2016-02,
    "amount": 10000
  }, 
  {
    "account": "B",
    "month": 2016-01,
    "amount": 7000
  }, 
  {
    "account": "B",
    "month": 2016-02,
    "amount": 14000
  }
]

并希望将其转换为

     [{
        "account": "A",
        "2016-01": 5000,
        "2016-02": 10000
        }, {
        "account": "B",
        "2016-01": 7000,
        "2016-02": 14000
     }]

如何通过account属性对数组中的所有对象进行分组？

我试过这段代码......

                    $entry_titles = json_decode($entry, true);
                    $store_account_id='';
                    $json_new=array();
                    foreach ($entry_titles as $row)
                    {
                         $account_id=$row['account_id'];
                         $amount=$row['amount'];
                         $month=$row['month'];

                         if ($store_account_id!=$account_id)
                         {
                            $json_new['account_id']=$account_id;
                            $json_new[$month]=$amount;
                         }
                         else 
                         {
                            $json_new[$month]=$amount; 
                            $data_new[]=$json_new;
                         }

                         $store_account_id=$account_id;


                    };