diff options
| author | Joël Cox <joel@joelcox.nl> | 2011-10-09 18:39:39 +0200 |
|---|---|---|
| committer | Joël Cox <joel@joelcox.nl> | 2011-10-09 18:39:39 +0200 |
| commit | f4fb1db458fab52d0493ead52c9ea7e01206eaa7 (patch) | |
| tree | c549600f342f4d3f0df75a2f2f7c265be0f1cc72 /user_guide/general/views.html | |
| parent | c4dd200c1155a118afa32cd91d9bd67bc243f83a (diff) | |
Moved tutorial to new user guide directory.
Diffstat (limited to 'user_guide/general/views.html')
| -rw-r--r-- | user_guide/general/views.html | 274 |
1 files changed, 0 insertions, 274 deletions
diff --git a/user_guide/general/views.html b/user_guide/general/views.html deleted file mode 100644 index a2273f862..000000000 --- a/user_guide/general/views.html +++ /dev/null @@ -1,274 +0,0 @@ -<!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 2.0.3</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="codeigniter.com/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 - 2011 · <a href="http://ellislab.com/">EllisLab, Inc.</a></p> -</div> - -</body> -</html>
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