274 lines
9.8 KiB
HTML
274 lines
9.8 KiB
HTML
|
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
|
||
|
|
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
|
||
|
|
<head>
|
||
|
|
|
||
|
|
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
|
||
|
|
<title>Views : CodeIgniter User Guide</title>
|
||
|
|
|
||
|
|
<style type='text/css' media='all'>@import url('../userguide.css');</style>
|
||
|
|
<link rel='stylesheet' type='text/css' media='all' href='../userguide.css' />
|
||
|
|
|
||
|
|
<script type="text/javascript" src="../nav/nav.js"></script>
|
||
|
|
<script type="text/javascript" src="../nav/prototype.lite.js"></script>
|
||
|
|
<script type="text/javascript" src="../nav/moo.fx.js"></script>
|
||
|
|
<script type="text/javascript" src="../nav/user_guide_menu.js"></script>
|
||
|
|
|
||
|
|
<meta http-equiv='expires' content='-1' />
|
||
|
|
<meta http-equiv= 'pragma' content='no-cache' />
|
||
|
|
<meta name='robots' content='all' />
|
||
|
|
<meta name='author' content='ExpressionEngine Dev Team' />
|
||
|
|
<meta name='description' content='CodeIgniter User Guide' />
|
||
|
|
|
||
|
|
</head>
|
||
|
|
<body>
|
||
|
|
|
||
|
|
<!-- START NAVIGATION -->
|
||
|
|
<div id="nav"><div id="nav_inner"><script type="text/javascript">create_menu('../');</script></div></div>
|
||
|
|
<div id="nav2"><a name="top"></a><a href="javascript:void(0);" onclick="myHeight.toggle();"><img src="../images/nav_toggle_darker.jpg" width="154" height="43" border="0" title="Toggle Table of Contents" alt="Toggle Table of Contents" /></a></div>
|
||
|
|
<div id="masthead">
|
||
|
|
<table cellpadding="0" cellspacing="0" border="0" style="width:100%">
|
||
|
|
<tr>
|
||
|
|
<td><h1>CodeIgniter User Guide Version 2.1.4</h1></td>
|
||
|
|
<td id="breadcrumb_right"><a href="../toc.html">Table of Contents Page</a></td>
|
||
|
|
</tr>
|
||
|
|
</table>
|
||
|
|
</div>
|
||
|
|
<!-- END NAVIGATION -->
|
||
|
|
|
||
|
|
|
||
|
|
<!-- START BREADCRUMB -->
|
||
|
|
<table cellpadding="0" cellspacing="0" border="0" style="width:100%">
|
||
|
|
<tr>
|
||
|
|
<td id="breadcrumb">
|
||
|
|
<a href="http://codeigniter.com/">CodeIgniter Home</a> ›
|
||
|
|
<a href="../index.html">User Guide Home</a> ›
|
||
|
|
Views
|
||
|
|
</td>
|
||
|
|
<td id="searchbox"><form method="get" action="http://www.google.com/search"><input type="hidden" name="as_sitesearch" id="as_sitesearch" value="ellislab.com/codeigniter/user-guide/" />Search User Guide <input type="text" class="input" style="width:200px;" name="q" id="q" size="31" maxlength="255" value="" /> <input type="submit" class="submit" name="sa" value="Go" /></form></td>
|
||
|
|
</tr>
|
||
|
|
</table>
|
||
|
|
<!-- END BREADCRUMB -->
|
||
|
|
|
||
|
|
<br clear="all" />
|
||
|
|
|
||
|
|
|
||
|
|
<!-- START CONTENT -->
|
||
|
|
<div id="content">
|
||
|
|
|
||
|
|
<h1>Views</h1>
|
||
|
|
|
||
|
|
<p>A <dfn>view</dfn> is simply a web page, or a page fragment, like a header, footer, sidebar, etc.
|
||
|
|
In fact, views can flexibly be embedded within other views (within other views, etc., etc.) if you need this type
|
||
|
|
of hierarchy.</p>
|
||
|
|
|
||
|
|
<p>Views are never called directly, they must be loaded by a <a href="controllers.html">controller</a>. Remember that in an MVC framework, the Controller acts as the
|
||
|
|
traffic cop, so it is responsible for fetching a particular view. If you have not read the <a href="controllers.html">Controllers</a> page
|
||
|
|
you should do so before continuing.</p>
|
||
|
|
|
||
|
|
<p>Using the example controller you created in the <a href="controllers.html">controller</a> page, let's add a view to it.</p>
|
||
|
|
|
||
|
|
<h2>Creating a View</h2>
|
||
|
|
|
||
|
|
<p>Using your text editor, create a file called <dfn>blogview.php</dfn>, and put this in it:</p>
|
||
|
|
|
||
|
|
<textarea class="textarea" style="width:100%" cols="50" rows="10">
|
||
|
|
<html>
|
||
|
|
<head>
|
||
|
|
<title>My Blog</title>
|
||
|
|
</head>
|
||
|
|
<body>
|
||
|
|
<h1>Welcome to my Blog!</h1>
|
||
|
|
</body>
|
||
|
|
</html>
|
||
|
|
</textarea>
|
||
|
|
|
||
|
|
<p>Then save the file in your <dfn>application/views/</dfn> folder.</p>
|
||
|
|
|
||
|
|
<h2>Loading a View</h2>
|
||
|
|
|
||
|
|
<p>To load a particular view file you will use the following function:</p>
|
||
|
|
|
||
|
|
<code>$this->load->view('<var>name</var>');</code>
|
||
|
|
|
||
|
|
<p>Where <var>name</var> is the name of your view file. Note: The .php file extension does not need to be specified unless you use something other than <kbd>.php</kbd>.</p>
|
||
|
|
|
||
|
|
|
||
|
|
<p>Now, open the controller file you made earlier called <dfn>blog.php</dfn>, and replace the echo statement with the view loading function:</p>
|
||
|
|
|
||
|
|
|
||
|
|
<textarea class="textarea" style="width:100%" cols="50" rows="10">
|
||
|
|
<?php
|
||
|
|
class Blog extends CI_Controller {
|
||
|
|
|
||
|
|
function index()
|
||
|
|
{
|
||
|
|
$this->load->view('blogview');
|
||
|
|
}
|
||
|
|
}
|
||
|
|
?>
|
||
|
|
</textarea>
|
||
|
|
|
||
|
|
|
||
|
|
<p>If you visit your site using the URL you did earlier you should see your new view. The URL was similar to this:</p>
|
||
|
|
|
||
|
|
<code>example.com/index.php/<var>blog</var>/</code>
|
||
|
|
|
||
|
|
<h2>Loading multiple views</h2>
|
||
|
|
<p>CodeIgniter will intelligently handle multiple calls to $this->load->view from within a controller. If more than one call happens they will be appended together. For example, you may wish to have a header view, a menu view, a content view, and a footer view. That might look something like this:</p>
|
||
|
|
<p><code><?php<br />
|
||
|
|
<br />
|
||
|
|
class Page extends CI_Controller {<br /><br />
|
||
|
|
|
||
|
|
function index()<br />
|
||
|
|
{<br />
|
||
|
|
$data['page_title'] = 'Your title';<br />
|
||
|
|
$this->load->view('header');<br />
|
||
|
|
$this->load->view('menu');<br />
|
||
|
|
$this->load->view('content', $data);<br />
|
||
|
|
$this->load->view('footer');<br />
|
||
|
|
}<br />
|
||
|
|
<br />
|
||
|
|
}<br />
|
||
|
|
?></code></p>
|
||
|
|
<p>In the example above, we are using "dynamically added data", which you will see below.</p>
|
||
|
|
<h2>Storing Views within Sub-folders</h2>
|
||
|
|
<p>Your view files can also be stored within sub-folders if you prefer that type of organization. When doing so you will need
|
||
|
|
to include the folder name loading the view. Example:</p>
|
||
|
|
|
||
|
|
<code>$this->load->view('<kbd>folder_name</kbd>/<var>file_name</var>');</code>
|
||
|
|
|
||
|
|
|
||
|
|
<h2>Adding Dynamic Data to the View</h2>
|
||
|
|
|
||
|
|
<p>Data is passed from the controller to the view by way of an <strong>array</strong> or an <strong>object</strong> in the second
|
||
|
|
parameter of the view loading function. Here is an example using an array:</p>
|
||
|
|
|
||
|
|
<code>$data = array(<br />
|
||
|
|
'title' => 'My Title',<br />
|
||
|
|
'heading' => 'My Heading',<br />
|
||
|
|
'message' => 'My Message'<br />
|
||
|
|
);<br />
|
||
|
|
<br />
|
||
|
|
$this->load->view('blogview', <var>$data</var>);</code>
|
||
|
|
|
||
|
|
<p>And here's an example using an object:</p>
|
||
|
|
|
||
|
|
<code>$data = new Someclass();<br />
|
||
|
|
$this->load->view('blogview', <var>$data</var>);</code>
|
||
|
|
|
||
|
|
<p>Note: If you use an object, the class variables will be turned into array elements.</p>
|
||
|
|
|
||
|
|
|
||
|
|
<p>Let's try it with your controller file. Open it add this code:</p>
|
||
|
|
|
||
|
|
<textarea class="textarea" style="width:100%" cols="50" rows="14">
|
||
|
|
<?php
|
||
|
|
class Blog extends CI_Controller {
|
||
|
|
|
||
|
|
function index()
|
||
|
|
{
|
||
|
|
$data['title'] = "My Real Title";
|
||
|
|
$data['heading'] = "My Real Heading";
|
||
|
|
|
||
|
|
$this->load->view('blogview', $data);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
?>
|
||
|
|
</textarea>
|
||
|
|
|
||
|
|
|
||
|
|
<p>Now open your view file and change the text to variables that correspond to the array keys in your data:</p>
|
||
|
|
|
||
|
|
|
||
|
|
<textarea class="textarea" style="width:100%" cols="50" rows="10">
|
||
|
|
<html>
|
||
|
|
<head>
|
||
|
|
<title><?php echo $title;?></title>
|
||
|
|
</head>
|
||
|
|
<body>
|
||
|
|
<h1><?php echo $heading;?></h1>
|
||
|
|
</body>
|
||
|
|
</html>
|
||
|
|
</textarea>
|
||
|
|
|
||
|
|
<p>Then load the page at the URL you've been using and you should see the variables replaced.</p>
|
||
|
|
|
||
|
|
<h2>Creating Loops</h2>
|
||
|
|
|
||
|
|
<p>The data array you pass to your view files is not limited to simple variables. You can
|
||
|
|
pass multi dimensional arrays, which can be looped to generate multiple rows. For example, if you
|
||
|
|
pull data from your database it will typically be in the form of a multi-dimensional array.</p>
|
||
|
|
|
||
|
|
<p>Here's a simple example. Add this to your controller:</p>
|
||
|
|
|
||
|
|
<textarea class="textarea" style="width:100%" cols="50" rows="17">
|
||
|
|
<?php
|
||
|
|
class Blog extends CI_Controller {
|
||
|
|
|
||
|
|
function index()
|
||
|
|
{
|
||
|
|
$data['todo_list'] = array('Clean House', 'Call Mom', 'Run Errands');
|
||
|
|
|
||
|
|
$data['title'] = "My Real Title";
|
||
|
|
$data['heading'] = "My Real Heading";
|
||
|
|
|
||
|
|
$this->load->view('blogview', $data);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
?>
|
||
|
|
</textarea>
|
||
|
|
|
||
|
|
|
||
|
|
<p>Now open your view file and create a loop:</p>
|
||
|
|
|
||
|
|
|
||
|
|
<textarea class="textarea" style="width:100%" cols="50" rows="24">
|
||
|
|
<html>
|
||
|
|
<head>
|
||
|
|
<title><?php echo $title;?></title>
|
||
|
|
</head>
|
||
|
|
<body>
|
||
|
|
<h1><?php echo $heading;?></h1>
|
||
|
|
|
||
|
|
<h3>My Todo List</h3>
|
||
|
|
|
||
|
|
<ul>
|
||
|
|
<?php foreach ($todo_list as $item):?>
|
||
|
|
|
||
|
|
<li><?php echo $item;?></li>
|
||
|
|
|
||
|
|
<?php endforeach;?>
|
||
|
|
</ul>
|
||
|
|
|
||
|
|
</body>
|
||
|
|
</html>
|
||
|
|
</textarea>
|
||
|
|
<p><strong>Note:</strong> You'll notice that in the example above we are using PHP's alternative syntax. If you
|
||
|
|
are not familiar with it you can read about it <a href="alternative_php.html">here</a>.</p>
|
||
|
|
|
||
|
|
<h2>Returning views as data</h2>
|
||
|
|
|
||
|
|
<p>There is a third <strong>optional</strong> parameter lets you change the behavior of the function so that it returns data as a string
|
||
|
|
rather than sending it to your browser. This can be useful if you want to process the data in some way. If you
|
||
|
|
set the parameter to <kbd>true</kbd> (boolean) it will return data. The default behavior is <kbd>false</kbd>, which sends it
|
||
|
|
to your browser. Remember to assign it to a variable if you want the data returned:</p>
|
||
|
|
|
||
|
|
<code>$string = $this->load->view('<var>myfile</var>', '', <kbd>true</kbd>);</code>
|
||
|
|
|
||
|
|
</div>
|
||
|
|
<!-- END CONTENT -->
|
||
|
|
|
||
|
|
|
||
|
|
<div id="footer">
|
||
|
|
<p>
|
||
|
|
Previous Topic: <a href="reserved_names.html">Reserved Names</a>
|
||
|
|
·
|
||
|
|
<a href="#top">Top of Page</a> ·
|
||
|
|
<a href="../index.html">User Guide Home</a> ·
|
||
|
|
Next Topic: <a href="models.html">Models</a>
|
||
|
|
</p>
|
||
|
|
<p><a href="http://codeigniter.com">CodeIgniter</a> · Copyright © 2006 - 2012 · <a href="http://ellislab.com/">EllisLab, Inc.</a></p>
|
||
|
|
</div>
|
||
|
|
|
||
|
|
</body>
|
||
|
|
</html>
|