Fetching information from the database MYSQL & Codeigniter

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 2  1994

Happy的楠姐

the previous question is here incase you guys needed a other information:

Fetching information from the database

ANOTHER UPDATE

Although

Database

Assuming that your database have the structure below.

+---------------+-----------+------------+--------------------+
| id_membership | username  | name       | email              |
+---------------+-----------+------------+--------------------+
|             1 | Marishka  | marishkapv | marishka@email.com |
|             2 | johndoe   | John       | john@doe.com       |
|             3 | dennisv   | Dennis     | dennis@v.com       |
+---------------+-----------+------------+--------------------+

Model

You could build your model class Membership extends CI_Model at /application/models/membership.php file.

class Membership extends CI_Model {

    function __construct()
    {
        parent::__construct();
    }

    function member_here()
    {
        $this->db->select('');
        $this->db->from('membership');
        $this->db->where('username',$this->input->post('username'));
        $q = $this->db->get('');

        if($q->num_rows() > 0) 
        {
            $data = array();
            foreach($q->result() as $row) 
            {
                $data=$row;
            }
            return $data;
        }
    }
}

Controller

Supposing that your have a login page at example.com/index.php/login, this should resides at /application/controllers/login.php as below:

class Login extends CI_Controller
{
    function __construct()
    {
        parent::__construct();
    }

    public function index()
    {
        $this->load->view('login_view');
    }

    public function result()
    {
        $this->load->model('membership');
        $data['member'] = $this->membership->member_here(); 
        $this->load->view('result_view', $data);
    }
}

Look like the models is loaded throws this two lines:

//Load the model in make use of its functions
$this->load->model('membership'); 

//load the row whit the given username
//the result is assigned to array with the key "member", in the view you access this
//value with $member var
$data['member'] = $this->membership->member_here();

Views

As you noted in controller code, there are two views files, login_view and result_view. The first one will show a html form where you can put the username in order to trigger a select query. The result_view show the informacion of the member according to the selected membership

login_view.php

<html>
    <head></head>
    <body>
    <form action="login/result" method="post">
        Type your username: <input type="text" name="username" />
        <input type="submit" value="Load from database" />
    </form>
    </body>
</html>

result_view.php

<h4>Details:</h4>
<p>
Id: <?=$member->id_membership?> <br />
Username: <?=$member->username?> <br />
Email: <?=$member->email?>
</p>

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悲&欢浪女

2021-01-26 12:40

This can be very simple read the user guide for more simple examples

Model

Class Members Extends CI_Model
{
    function __construct(){
        parent::__construct();
    }

    function member_here()
    {
            $this->db->where('username',$this->input->post('username'));
        $query  =   $this->db->get('membership');

        if($query->num_rows() > 0) 
        {
            return $query->result();
        }
    }
}

Controlelr 

Class Login extends CI_Controller
{
    function __construct()
    {
        parent::__construct();
    }

    public function index()
    {
        $this->load->view('login_view');
    }

    public function result()
    {
        $this->load->model('membership');
        $data['member'] = $this->membership->member_here(); 
        $this->load->view('result_view', $data);
    }
}

And in View you can simple do it

<?php
foreach($member as $row){
?>
<option value="<?php echo $row->id?>"><?php echo $row->name?></option>
<?php
}
?>

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