读取一个数组并合并新的新agaist相同的键和值php

Question

  $merged = array();
  while($row = mysqli_fetch_assoc($get_data_res)){
    $merged[] = $row;
  }


echo '<pre>'; print_r($merged); echo '</pre>';

打印数组后我得到了这个输出

Array
(
    [0] => Array
        (
            [lees_than_60] => 50
            [one_four] => 48
            [four_min] => 0
            [id] => 24
            [first_name] => Yogini
            [log_in_time] => 0000-00-00 00:00:00
            [log_out_time] => 0000-00-00 00:00:00
            [calldate] => 2014-05-22
            [clid] => 2433
        )

    [1] => Array
        (
            [lees_than_60] => 14
            [one_four] => 6
            [four_min] => 2
            [id] => 28
            [first_name] => Vijay
            [log_in_time] => 2014-05-28 16:57:51
            [log_out_time] => 2014-05-28 16:58:12
            [calldate] => 2014-05-22
            [clid] => 2436
        )

    [2] => Array
        (
            [lees_than_60] => 64
            [one_four] => 60
            [four_min] => 0
            [id] => 23
            [first_name] => Pratibha
            [log_in_time] => 2014-05-28 15:55:18
            [log_out_time] => 2014-05-28 15:55:44
            [calldate] => 2014-05-22
            [clid] => 2431
        )
)

我的问题是我想创建下面的数组，就像我想要创建针对相同calldate 2014-05-22的新数组，即只有一个calldate并保留所有数据，如：

  

[calldate] =＆gt; 2014年5月22日

显示aove通话日期的整个数据不应重复合并