Question

我目前正致力于codeigniter。我想显示一个没有重复的值，或者将MySQL数据库中的重复值覆盖到PHP foreach循环的数据表中。

这是我在数据库中的2个表格的图片：

这是我的两个表的关系：

Relation of table "employees" & table "times"

这是我的控制器（home.php）：

public function goPresent() { // attendance present page
    $this->load->model('Model_attendance');
    $query = $this->Model_attendance->getEmployees();
    $data['EMPLOYEES'] = null;
    if ($query) {
        $data['EMPLOYEES'] = $query;
    }
    $this->load->view('imports/header');
    $this->load->view('imports/menu');
    $this->load->view('attend', $data);
}

这是我的模型（model_attendance.php）：

class Model_attendance extends CI_Model {

    public $userID;
    public $username;
    public $password;
    public $totime;
    public $absence_type;
    public $date;
    public $hours;

    public function getEmployees() {
        $this->db->select("*");
        $this->db->from('times');
        $this->db->join('employees', 'employees.empnum = times.userID');
        $query = $this->db->get();
        return $query->result();
    }
}

这是我的观点（attend.php）：

<table class="table table-striped responsive-utilities jambo_table" id="myTable">
    <thead>
        <tr class="headings">
            <th>Employee No.</th>
            <th>Username</th>
            <th>Name</th>
            <th>Status</th> 
        </tr>
    </thead>
    <tbody>
        <?php 
        foreach($EMPLOYEES as $employee){?>
        <tr>
            <td><?php echo $employee->empnum; ?></td>
            <td><?php echo $employee->username; ?></td> 
            <td><?php echo $employee->name; ?> <?php echo $employee->lastname; ?></td>
            <td><?php 
                if ($employee->hasClockOut==1){
                    echo '<a class="label label-danger">Inactive</a>';
                }else {
                    echo '<a class="label label-success">Active</a>';
                }
                ?></td> 
            </tr>
            <?php } ?>
        </tbody>
</table>

Answer 1

您希望在哪个基础上使用唯一值，只需在查询中添加此行....

$this->db->group_by("column name which needs to be unique");

Answer 2

 <?php
                                $customers =   $this->db->group_by('customer_id')->get_where('registered_table' , array(
                                    'chat_group_id' => $group_id , 'year' => $reg_year
                                ))->result_array();
                                foreach($customers as $row):?>.....

上面的示例代码将找到重复的customer_id，并避免按预期打印出重复的值。在这里，我使用 group_by（'customer-id'）

Codeigniter：如何避免在表中的PHP foreach循环中显示重复值或覆盖重复值？

2 个答案: