在Codeigniter中从数据库中获取数据 [英] Fetch data from database in codeigniter

问题描述

我有2种情况，我要在codeigniter中获取同一表的全部数据和行总数，我想知道有一种方法可以获取总行数，整个数据和3个最新行通过一个代码从同一张表中插入记录

I have 2 cases where i am fetching the entire data and total number of rows of a same table in codeigniter, I wish to know that is there a way through which i can fetch total number of rows, entire data and 3 latest inserted records from the same table through one code

这两种情况的控制器代码如下(尽管我分别针对每种情况使用了不同的参数)

Controller code for both cases is as given below (although i am applying it for each case seperately with different parameters)

public function dashboard()
    {
        $data['instant_req'] = $this->admin_model->getreq();
        $this->load->view('admin/dashboard',$data);
    }

1)从codeigniter中的表中获取全部数据

1) to fetch the entire data from a table in codeigniter

型号代码

public function getreq()
    {
        $this->db->where('status','pending');
        $query=$this->db->get('instanthire');
        return $query->result();
    }

查看代码

foreach ($instant_req as $perreq) 
    {
        echo $perreq->fullname;
        echo "<br>";
    }

2)从Codeigniter中的表中获取行数

2) to fetch number of rows from a table in codeigniter

public function getreq()
    {
        $this->db->where('status','pending');
        $query=$this->db->get('instanthire');
        return $query->num_rows();
    }

查看代码

echo $instant_req;

推荐答案

您只能创建一个函数，一次给您所有数据，总行数，全部数据和3条最新插入的记录

You can make only one function that gives you the all data at once total number of rows, entire data and 3 latest inserted records

例如在模型中

public function getreq()
{
    $this->db->where('status','pending');
    $query=$this->db->get('instanthire');
    $result=$query->result();
    $num_rows=$query->num_rows();
    $last_three_record=array_slice($result,-3,3,true);
    return array("all_data"=>$result,"num_rows"=>$num_rows,"last_three"=>$last_three_record);
}

在控制器仪表板功能中

public function dashboard()
{
    $result = $this->admin_model->getreq();
    $this->load->view('admin/dashboard',$result);
}

查看中

foreach ($all_data as $perreq) 
{
    echo $perreq->fullname;
    echo "<br>";
}
//latest three record
foreach ($last_three as $perreq) 
{
    echo $perreq->fullname;
    echo "<br>";
}
//total count
echo $num_rows;

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