如何删除数组中的重复项

时间:2017-06-10 18:00:19

标签: php mysql sql arrays codeigniter

我想显示每月的带宽使用情况,
有2位用户均于6月登录 这是我的代码:

<?php foreach ($data as $row):

            $date = $row['acctstarttime'];
            $d = date_parse_from_format("Y-m-d", $date);

             $monthNum  = $d["month"];
             $dateObj   = DateTime::createFromFormat('!m', $monthNum);
             $monthName = $dateObj->format('F');                
                        ?>

                <td><?php echo $monthName;?></td>
                </tr>
<?php endforeach;?>

输出是:
- 6月
                 - 六月                  - 7月号

我需要的输出:
- 6月
- 7月

我尝试将查询更改为:

Function showData() 
    { 

    $this->db->distinct('radacct.acctstarttime'); 
    $this->db->from('radacct');
    $this->db->where('radacct.acctstarttime','y-06-d-h');
    $query = $this->db->get();


    If ($query->num_rows()>0) 
    { 
      Return $query->result(); 
    } 
    Else 
    { 
     Return array(); 
    } 
 }

但它什么都没改变(我的查询错了吗?)

我也尝试过:foreach (array_unique($data) as $row)

但它删除了7月份

<?php print_r($row['acctstarttime'])?>的输出 是:2017-06-08 04:12:00 2017-06-08 04:12:00 2017-07-12 05:00:00

1 个答案:

答案 0 :(得分:2)

试试这个:

    <?php 
    $month = [];
    foreach ($data as $row):
        if(!in_array($d["month"], $month)) {
            $month[] = $d['month'];
            $date = $row['acctstarttime'];
            $d = date_parse_from_format("Y-m-d", $date);

            $monthNum  = $d["month"];
            $dateObj   = DateTime::createFromFormat('!m', $monthNum);
            $monthName = $dateObj->format('F');                
            ?>

            <td><?php echo $monthName;?></td>
            </tr>

            <?php 
        }
     endforeach;
  ?>

<强>更新

    $month = array(); 
    foreach ($data as $row):
       $date = $row['acctstarttime'];
       $d = date_parse_from_format("Y-m-d", $date);
       $monthNum  = $d["month"];
       $dateObj   = DateTime::createFromFormat('!m', $monthNum);
       $monthName = $dateObj->format('F');  
       if(!in_array($monthName, $month)) {
            $month[] = $monthName;
            echo $monthName;
       }
     endforeach;