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Diffstat (limited to 'user_guide/general/views.html')
| -rw-r--r-- | user_guide/general/views.html | 546 |
1 files changed, 273 insertions, 273 deletions
diff --git a/user_guide/general/views.html b/user_guide/general/views.html index ff6006025..a8c3d6029 100644 --- a/user_guide/general/views.html +++ b/user_guide/general/views.html @@ -1,274 +1,274 @@ -<!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 1.7</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 Controller {
-
- function index()
- {
- $this->load->view('blogview');
- }
-}
-?>
-</textarea>
-
-
-<p>If you visit the 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 then 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 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 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 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 © 2006-2008 · <a href="http://ellislab.com/">Ellislab, Inc.</a></p>
-</div>
-
-</body>
+<!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 1.7</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 Controller { + + function index() + { + $this->load->view('blogview'); + } +} +?> +</textarea> + + +<p>If you visit the 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 then 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 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 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 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 © 2006-2008 · <a href="http://ellislab.com/">Ellislab, Inc.</a></p> +</div> + +</body> </html>
\ No newline at end of file |