Need Basic MVC Example - Printable Version

Need Basic MVC Example - Printable Version

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+--- Thread: Need Basic MVC Example (/showthread.php?tid=41271)

Need Basic MVC Example - El Forum - 05-03-2011

[eluser]cupidleomanoj[/eluser]
hi, am new to codeigniter as well as to MVC architecture, can any one help me to how the values are to be fetched from database and dispalyed, please i cant get it done. please give me a basic example. thanks in adavnce

Need Basic MVC Example - El Forum - 05-03-2011

[eluser]oppenheimer[/eluser]
I think the <a href="http://codeigniter.com/tutorials/">video tutorials<a> are very good at this.

Need Basic MVC Example - El Forum - 05-03-2011

[eluser]cupidleomanoj[/eluser]
thanks for your reply, I have tried something with CI, but i cant get the output. can you please help me. the following are the codes.

model:- (file name : Helloworld_model.php)

<?php
class Helloworld_model extends CI_Model {
public function __construct() {
parent::__construct();
}
function getData() {
$query=$this->db->get('data');
if($query->num_rows() > 0) {
}
else {
return $query->result();
}
}
}
?>

controller:- (filename : helloworld.php)

<?php
class Helloworld extends CI_Controller {
public function __construct() {
parent::__construct();
// Your own constructor code
}
function index() {
$this->load->model('helloworld_model');
$data['result'] = $this->helloworld_model->getData();
$data['page_title'] = "CI";
$this->load->view('helloworld_view',$data);
}
}
?>

view:- (filename : helloworld_view.php)

<html>
<head>
<title><?=$page_title?></title>
</head>
<body>
<?php foreach($result as $row):?>
<h3><?=$row->title?></h3>
<p><?=$row->text?></p>
<br />
<?php endforeach;?>
</body>
</html>

----------------------------------------------

I get error as

A PHP Error was encountered

Severity: Warning

Message: Invalid argument supplied for foreach()

Filename: views/helloworld_view.php

Line Number: 6

-------------------------------------------------

Need Basic MVC Example - El Forum - 05-03-2011

[eluser]oppenheimer[/eluser]
Change your model with this return

Code:
return $query->result_array();

That should address the error.

However, I wasn't familiar with this syntax in your view:

Code:
&lt;title&gt;&lt;?=$page_title?&gt;&lt;/title&gt;

I usually use:

Code:
&lt;title&gt;&lt;? echo $page_title; ?&gt;&lt;/title&gt;

Need Basic MVC Example - El Forum - 05-03-2011

[eluser]John_Betong_002[/eluser]
Check your model...

Code:
class Helloworld_model extends CI_Model

{

public function __construct()

{

  parent::__construct();

}

function getData()

{

  $query=$this->db->get(‘data’);

  if($query->num_rows() > 0)

  {

     // no value returned ???

  }else{

    return $query->result(); // ZERO rows returned 

  }

}//endfunc

}//endclass

Need Basic MVC Example - El Forum - 05-04-2011

[eluser]cupidleomanoj[/eluser]
hi friends thanks for your solutions i got my desired output. thank you...

Need Basic MVC Example - El Forum - 05-04-2011

[eluser]cupidleomanoj[/eluser]
hi oppenheimer,
* your told that your are not familiar with the syntax <title><?=$page_title?></title>, there are "short_open_tag" in PHP, it is very common as of the <title><?php echo $page_title; ?></title>.
* To use this shortcut syntax you need to enable the short_open_tag in the phpinfo();

follow the example:

<?php
$message1 = "<p>This is my primary message.</p>\n";
?>
<?php echo $message1; ?> //normal syntax
<?=$message1?> //shortcut syntax