从数据库MYSQL和笨获取信息(Fetching information from the data

2019-08-02 15:03发布

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前一个问题是在这里柜面你们需要的其他信息：

从数据库中获取信息

另一个更新

尽管大家都非常有帮助。 我已经成功地得到输出，但我真的还是真糊涂让说，我想先看看outpurs这样的IM不顾控制器。

我将做一个控制器后，我看到我的命令是正确的:)我不知道为什么，但我怎么得到多数民众赞成kindo了解整个概念。 无论如何..

我membership_model.php 

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;
}
}

我signup_view.php 

<html>
<head>
<title></title>
</head>
<body>
<?php $this->load->view('includes/header')?>

<div align="right"><?php echo anchor('login/signin', 'Login');?></div>

<?php

$option1 = array(
              'name'  => 'What was your childhood nickname?',
              'value'   => 'What was your childhood nickname?'
            );

$option2= array(
    'name'  => 'What is your pet\'s name?',
    'value' => 'What is your pet\s name?'
);

$option3= array(
    'name'  => 'In what city were you born?',
    'value' => 'In what city were you born?'
);

$option4= array(
    'name'  => 'What is the color of your eyes?',
    'value' => 'What is the color of your eyes?'
);

$option5= array(
    'name'  => 'What is your favorite color?',
    'value' => 'What is your favorite color?'
);


echo form_open('login/create_member');
echo "<table width=\"80%\ cellpadding=\"3px\">
<tr>
<td>User Information:</td>
</tr>
<tr>
<td>&nbsp;</td>
</tr>";
echo "<tr><td>First Name*: </td></tr>";
echo "<tr><td>";
echo form_input('first_name', set_value('first_name'));
echo "</tr></td>";
echo "<tr><td>Last Name*: </td></tr>";
echo "<tr><td>";
echo form_input('last_name', set_value('last_name'));
echo "</td></tr>";
echo "<tr><td>Email Address*: </td></tr>";
echo "<tr><td>";
echo form_input('email_address', set_value('email_address'));
echo "</tr></td>";
echo "<tr><td>Gender: </td></tr>";
echo "<tr><td>";
?>
<input type="radio" name="gender" value="Male" />Male &nbsp;
<input type="radio" name="gender" value="Female" />Female
<?php

echo "</tr></td>";

echo "<tr>
<td></td>
</tr>
</table>";
?>



<?php
echo "<table width=\"80%\ cellpadding=\"3px\">
<tr>
<td> Account Information:</td>
</tr>
<tr>
<td>&nbsp;</td>
</tr>";
echo "<tr><td>Userame*: </td></tr>";
echo "<tr><td>";
echo form_input('username', set_value('username'));
echo "</td></tr>";
echo "<tr><td>Password*: </td></tr>";
echo "<tr><td>";
echo form_password('password');
echo "</td></tr>";
echo "<tr><td>Password Confirmation*: </td></tr>";
echo "<tr><td>";
echo form_password('password2');
echo "</td></tr>";
echo "<tr><td>";
echo "Security Question*:";
echo "</td></tr>";
echo "<tr><td>";
?>
<select name = "security_question" value="security question">
<option value = "What was your childhood nickname?">What was your childhood nickname?</option>
<option value = "What is your pet's name?">What is your pet's name?</option>
<option value = "In what city were you born?">In what city were you born?</option>
<option value = "What is the color of your eyes?">What is the color of your eyes?</option>
<option value = "What is your favorite color?">What is your favorite color?</option>
</select>

<?php
echo "</td></tr>";
echo "<tr><td>";
echo "Security Answer*:";
echo "</td></tr>";
echo "<tr><td>";
echo form_input('security_answer');
echo "</td></tr>";

echo "<tr><td>";
echo form_submit('submit', 'Register');
echo form_reset('reset', 'Reset');
echo "</tr></td>";
echo form_close();

echo "<tr>
<td></td>
</tr>
</table>";
?>



<?php echo validation_errors('<p class="error">');?>

所以，这就是我的所有代码。 我试图让名字，姓氏，EMAIL_ADDRESS和登录用户的所有其他信息从数据库中走出来。

如果我使用$data[]=$row; 代替$data=$row; 在我的模型时出现错误，这样说：

Severity: Notice

Message: Trying to get property of non-object

Filename: views/members_area.php

Line Number: 20

所以我该怎么做。 我编码无需控制器。 我只是检查结果 谢谢！

Answer 1:

有迹象表明，可以澄清一些事情：

  • 一个model是，在数据库中仍然存在一个实体。 你的情况： 会籍
  • 甲controller负责加载模型，并把它传递到视图的要被显示
  • 甲view仅应具有HTML标记，无功能，没有逻辑。

数据库

假设你的数据库具有以下结构。 

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

模型

你可以建立你的模型class Membership extends CI_Model在/application/models/membership.php文件。 

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;
        }
    }
}

调节器

假设你有在登录页面example.com/index.php/login ，这应该驻留在/application/controllers/login.php如下： 

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);
    }
}

看起来像装抛出这个两行的模式： 

//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();

查看

正如你在控制器代码指出，有两种观点的文件， login_view和result_view 。 第一个将显示一个HTML表单，您可以把用户名，以触发选择查询。 所述result_view根据所选择的成员显示所述构件的信息

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>


Answer 2:

这可以是非常简单的阅读更简单的例子，用户指南

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
}
?>


文章来源: Fetching information from the database MYSQL & Codeigniter
标签： php mysql database codeigniter
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