如何从 codeigniter 中的模型相同函数返回多行？答案

【问题标题】：How can I return multiple rows from the model same function in codeigniter?如何从 codeigniter 中的模型相同函数返回多行？
【发布时间】：2017-03-11 08:40:28
【问题描述】：

此代码只打印一行，不打印所有数据

型号

public function schbysempaid($batch, $sem){
        $query=$this->db->query("SELECT * FROM stu WHERE curem=$sem AND baid=$batch");
        foreach ($query->result_array() as $row) {
            $querys=$this->db->query("SELECT SUM(install.adfee) as am,SUM(install.lifee) as lb,SUM(install.tfee) as tt,SUM(install.enrfee) as enr,SUM(install.refee) as re,SUM(install.spofee) as spo,SUM(install.exfee) as ex FROM stu JOIN install ON install.sid=stu.sid Where install.sid='".$row['sid']."' AND install.curem=$sem AND stu.curem=$sem AND stu.baid=$batch AND install.paid=1");
        return $querys->result_array();
        }
    }

控制器

public function searchsubmit()
{
        $batch=$this->input->post('srch');
        $sem=$this->input->post('srch1');
        $data['searchpaid']=$this->law_model->schbysempaid($batch, $sem);
        $this->load->view('admission/dashboard',$data);
}

【问题讨论】：

标签： php arrays codeigniter

【解决方案1】：

您在 foreach 循环中返回结果，而不是您可以将该数据保存在数组中，并在循环结束后返回它。检查下面

function schbysempaid($batch, $sem)
{
    $query = $this->db->query("SELECT * FROM stu WHERE curem=$sem AND baid=$batch");
    $result = $query->result_array();
    $retArr = [];
    foreach ($result as $row) {
        $querys = $this->db->query("SELECT SUM(install.adfee) as am,SUM(install.lifee) as lb,SUM(install.tfee) as tt,SUM(install.enrfee) as enr,SUM(install.refee) as re,SUM(install.spofee) as spo,SUM(install.exfee) as ex FROM stu JOIN install ON install.sid=stu.sid Where install.sid='" . $row['sid'] . "' AND install.curem=$sem AND stu.curem=$sem AND stu.baid=$batch AND install.paid=1");
        $retArr[] = $querys->result_array();
    }
    return $retArr; // I am returning your data here
}

【讨论】：

【解决方案2】：

更改以下行：

return $querys->result_array();

到

$response[] = $querys->result_array();

解释：您在循环中使用$querys->result_array();，在这种情况下，对于第一次迭代，它会返回结果并跳过下一次迭代。所以将它保存在某个数组中并像这样返回它：

return $response;

【讨论】：

【解决方案3】：

型号

public function schbysempaid($batch, $sem){
$result = array();
        $query=$this->db->query("SELECT * FROM stu WHERE curem=$sem AND baid=$batch");
        foreach ($query->result_array() as $row) {
            $querys=$this->db->query("SELECT SUM(install.adfee) as am,SUM(install.lifee) as lb,SUM(install.tfee) as tt,SUM(install.enrfee) as enr,SUM(install.refee) as re,SUM(install.spofee) as spo,SUM(install.exfee) as ex FROM stu JOIN install ON install.sid=stu.sid Where install.sid='".$row['sid']."' AND install.curem=$sem AND stu.curem=$sem AND stu.baid=$batch AND install.paid=1");
        $result[] = $querys->result_array();
}

return $result;
    }

控制器

    public function searchsubmit()
{
        $batch=$this->input->post('srch');
        $sem=$this->input->post('srch1');
        $data['result']=$this->law_model->schbysempaid($batch, $sem);
        $this->load->view('admission/dashboard',$data);
}

查看

foreach($result as $paid){
<td><?php echo $paid['am'] ?></td>
                          <td><?php echo $paid['lb'] ?></td>
                          <td><?php echo $paid['tt'] ?></td>
                          <td><?php echo $paid['spo'] ?></td>
                          <td><?php echo $paid['ex'] ?></td>
                          <td><?php echo $paid['enr'] ?></td>
                          <td><?php echo $paid['re'] ?></td>
}

【讨论】：

请给出完整的错误。所以我可以正确理解
我只想知道什么是未定义的..？我的意思是哪个变量是未定义的。？
未定义索引：am 等等

【解决方案4】：

您只得到一行，因为在您的模型中，您的 return 语句位于循环内，因此在第一次迭代后返回数据。尝试将 return 语句放在循环之后。

public function schbysempaid($batch, $sem){
    $query=$this->db->query("SELECT * FROM stu WHERE curem=$sem AND baid=$batch");
    $temp_arr = array();
    foreach ($query->result_array() as $row) {
        $querys=$this->db->query("SELECT SUM(install.adfee) as am,SUM(install.lifee) as lb,SUM(install.tfee) as tt,SUM(install.enrfee) as enr,SUM(install.refee) as re,SUM(install.spofee) as spo,SUM(install.exfee) as ex FROM stu JOIN install ON install.sid=stu.sid Where install.sid='".$row['sid']."' AND install.curem=$sem AND stu.curem=$sem AND stu.baid=$batch AND install.paid=1");
        array_push($temp_arr , $querys->result_array());
    }
    return $temp_arr;
}

【讨论】：