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Thursday, August 5, 2010

Codeigniter Layout Library

Create Layout.php in libraries(/application/libraries/Layout.php) folder and copy the below code in the file
< ?php if (!defined('BASEPATH')) exit('No direct script access allowed'); class Layout { var $obj; var $layout; function Layout($layout = "layout_main") { $this->obj =& get_instance();
$this->layout = $layout;
}

function setLayout($layout)
{
$this->layout = $layout;
}

function view($view, $data=null, $return=false)
{
$loadedData = array();
$loadedData['content_for_layout'] = $this->obj->load->view($view,$data,true);

if($return)
{
$output = $this->obj->load->view($this->layout, $loadedData, true);
return $output;
}
else
{
$this->obj->load->view($this->layout, $loadedData, false);
}
}
}
? >


Then load your library in your controller

You can use it in two ways. First and obvious is to place the following line in the controller’s constructor function.

$this->load->library('layout', 'layout_main');

The second is by enabling codeIgniter to autoload the library by editing /application/config/autoload.php

$autoload['libraries'] = array('layout');

in your controller you may do this:

$this->layout->view('welcome_message');

Master layout

/application/views/layout_main.php
Your view file must use $content_for_layout. For example:

<html>
<head>
<title><?=$title_for_layout?></title>
<meta http-equiv="content-type" content="text/html;charset=utf-8" />
<link rel="stylesheet" href="/css/main.css" type="text/css" />
</head>
<body>
<div id="pagewidth" >
  <div id="header" ><img src="/images/header.jpg" width="700" height="200"></div>
  <div id="wrapper" class="clearfix" >
    <div id="twocols" class="clearfix">
      <?php echo $content_for_layout?>
    </div>
  </div>
  <div id="footer" > Footer </div>
</div>
</body>
</html>

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