bzr branch
http://gegoxaren.bato24.eu/bzr/lenasys/trunk
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20.1.1
by galaxyAbstractor
* Added an simple admin panel to the codeviewer-cmssy stuff |
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<head> |
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> |
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<title>Views : CodeIgniter User Guide</title> |
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<style type='text/css' media='all'>@import url('../userguide.css');</style> |
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<link rel='stylesheet' type='text/css' media='all' href='../userguide.css' /> |
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<meta name='author' content='ExpressionEngine Dev Team' /> |
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<meta name='description' content='CodeIgniter User Guide' /> |
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</head> |
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<body> |
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<!-- START NAVIGATION -->
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<div id="nav"><div id="nav_inner"><script type="text/javascript">create_menu('../');</script></div></div> |
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<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> |
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<div id="masthead"> |
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<table cellpadding="0" cellspacing="0" border="0" style="width:100%"> |
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<tr> |
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<td><h1>CodeIgniter User Guide Version 2.1.3</h1></td> |
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<td id="breadcrumb_right"><a href="../toc.html">Table of Contents Page</a></td> |
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</tr> |
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</table> |
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</div> |
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<!-- END NAVIGATION -->
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<!-- START BREADCRUMB -->
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<table cellpadding="0" cellspacing="0" border="0" style="width:100%"> |
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<tr> |
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<td id="breadcrumb"> |
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<a href="http://codeigniter.com/">CodeIgniter Home</a> › |
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<a href="../index.html">User Guide Home</a> › |
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Views |
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</td> |
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<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> |
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</tr> |
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</table> |
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<!-- END BREADCRUMB -->
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<br clear="all" /> |
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<!-- START CONTENT -->
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<div id="content"> |
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<h1>Views</h1> |
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<p>A <dfn>view</dfn> is simply a web page, or a page fragment, like a header, footer, sidebar, etc. |
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In fact, views can flexibly be embedded within other views (within other views, etc., etc.) if you need this type |
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of hierarchy.</p> |
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<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 |
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traffic cop, so it is responsible for fetching a particular view. If you have not read the <a href="controllers.html">Controllers</a> page |
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you should do so before continuing.</p> |
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<p>Using the example controller you created in the <a href="controllers.html">controller</a> page, let's add a view to it.</p> |
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<h2>Creating a View</h2> |
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<p>Using your text editor, create a file called <dfn>blogview.php</dfn>, and put this in it:</p> |
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<textarea class="textarea" style="width:100%" cols="50" rows="10"> |
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<html>
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<head>
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<title>My Blog</title> |
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</head>
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<body>
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<h1>Welcome to my Blog!</h1> |
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</body>
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</html>
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</textarea> |
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<p>Then save the file in your <dfn>application/views/</dfn> folder.</p> |
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<h2>Loading a View</h2> |
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<p>To load a particular view file you will use the following function:</p> |
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<code>$this->load->view('<var>name</var>');</code> |
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<p>Where <var>name</var> is the name of your view file. Note: The .php file extension does not need to be specified unless you use something other than <kbd>.php</kbd>.</p> |
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<p>Now, open the controller file you made earlier called <dfn>blog.php</dfn>, and replace the echo statement with the view loading function:</p> |
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<textarea class="textarea" style="width:100%" cols="50" rows="10"> |
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<?php
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class Blog extends CI_Controller {
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function index() |
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{
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$this->load->view('blogview');
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} |
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} |
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?>
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</textarea> |
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<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> |
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<code>example.com/index.php/<var>blog</var>/</code> |
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<h2>Loading multiple views</h2> |
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<p>CodeIgniter will intelligently handle multiple calls to $this->load->view from within a controller. If more than one call happens they will be appended together. For example, you may wish to have a header view, a menu view, a content view, and a footer view. That might look something like this:</p> |
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<p><code><?php<br /> |
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<br /> |
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class Page extends CI_Controller {<br /><br />
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function index()<br /> |
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{<br /> |
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$data['page_title'] = 'Your title';<br /> |
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$this->load->view('header');<br /> |
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$this->load->view('menu');<br /> |
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$this->load->view('content', $data);<br /> |
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$this->load->view('footer');<br /> |
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}<br /> |
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<br /> |
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}<br /> |
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?></code></p> |
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<p>In the example above, we are using "dynamically added data", which you will see below.</p> |
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<h2>Storing Views within Sub-folders</h2> |
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<p>Your view files can also be stored within sub-folders if you prefer that type of organization. When doing so you will need |
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to include the folder name loading the view. Example:</p> |
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<code>$this->load->view('<kbd>folder_name</kbd>/<var>file_name</var>');</code> |
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<h2>Adding Dynamic Data to the View</h2> |
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<p>Data is passed from the controller to the view by way of an <strong>array</strong> or an <strong>object</strong> in the second |
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parameter of the view loading function. Here is an example using an array:</p> |
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<code>$data = array(<br /> |
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'title' => 'My Title',<br /> |
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'heading' => 'My Heading',<br /> |
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'message' => 'My Message'<br /> |
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);<br /> |
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<br /> |
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$this->load->view('blogview', <var>$data</var>);</code>
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<p>And here's an example using an object:</p> |
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<code>$data = new Someclass();<br /> |
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$this->load->view('blogview', <var>$data</var>);</code>
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<p>Note: If you use an object, the class variables will be turned into array elements.</p> |
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<p>Let's try it with your controller file. Open it add this code:</p> |
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<textarea class="textarea" style="width:100%" cols="50" rows="14"> |
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<?php
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class Blog extends CI_Controller {
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function index() |
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{
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$data['title'] = "My Real Title"; |
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$data['heading'] = "My Real Heading"; |
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$this->load->view('blogview', $data);
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} |
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} |
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?>
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</textarea> |
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<p>Now open your view file and change the text to variables that correspond to the array keys in your data:</p> |
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<textarea class="textarea" style="width:100%" cols="50" rows="10"> |
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<html>
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<head>
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<title><?php echo $title;?></title> |
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</head>
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<body>
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<h1><?php echo $heading;?></h1> |
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</body>
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</html>
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</textarea> |
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<p>Then load the page at the URL you've been using and you should see the variables replaced.</p> |
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<h2>Creating Loops</h2> |
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<p>The data array you pass to your view files is not limited to simple variables. You can |
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pass multi dimensional arrays, which can be looped to generate multiple rows. For example, if you |
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pull data from your database it will typically be in the form of a multi-dimensional array.</p> |
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<p>Here's a simple example. Add this to your controller:</p> |
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<textarea class="textarea" style="width:100%" cols="50" rows="17"> |
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<?php
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class Blog extends CI_Controller {
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function index() |
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{
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$data['todo_list'] = array('Clean House', 'Call Mom', 'Run Errands');
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$data['title'] = "My Real Title"; |
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$data['heading'] = "My Real Heading"; |
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$this->load->view('blogview', $data);
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} |
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} |
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?>
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</textarea> |
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<p>Now open your view file and create a loop:</p> |
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<textarea class="textarea" style="width:100%" cols="50" rows="24"> |
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<html>
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<head>
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<title><?php echo $title;?></title> |
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</head>
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<body>
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<h1><?php echo $heading;?></h1> |
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<h3>My Todo List</h3> |
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<ul>
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<?php foreach ($todo_list as $item):?>
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<li><?php echo $item;?></li> |
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<?php endforeach;?>
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</ul>
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</body>
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</html>
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</textarea> |
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<p><strong>Note:</strong> You'll notice that in the example above we are using PHP's alternative syntax. If you |
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are not familiar with it you can read about it <a href="alternative_php.html">here</a>.</p> |
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<h2>Returning views as data</h2> |
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<p>There is a third <strong>optional</strong> parameter lets you change the behavior of the function so that it returns data as a string |
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rather than sending it to your browser. This can be useful if you want to process the data in some way. If you |
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set the parameter to <kbd>true</kbd> (boolean) it will return data. The default behavior is <kbd>false</kbd>, which sends it |
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to your browser. Remember to assign it to a variable if you want the data returned:</p> |
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<code>$string = $this->load->view('<var>myfile</var>', '', <kbd>true</kbd>);</code> |
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</div> |
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<!-- END CONTENT -->
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<div id="footer"> |
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<p> |
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Previous Topic: <a href="reserved_names.html">Reserved Names</a> |
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·
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<a href="#top">Top of Page</a> · |
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<a href="../index.html">User Guide Home</a> · |
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Next Topic: <a href="models.html">Models</a> |
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</p> |
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<p><a href="http://codeigniter.com">CodeIgniter</a> · Copyright © 2006 - 2012 · <a href="http://ellislab.com/">EllisLab, Inc.</a></p> |
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</div> |
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</body> |
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</html> |