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admin05186612006-10-28 03:28:01 +0000[diff] [blame]36<td><h1>Code Igniter User Guide Version 1.5.0</h1></td>
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48<a href="http://www.codeigniter.com/">Code Igniter Home</a> &nbsp;&#8250;&nbsp;
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50MVC
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64<h1>Model-View-Controller</h1>
65
admine334c472006-10-21 19:44:22 +0000[diff] [blame]66<p>Code Igniter is based on the Model-View-Controller development pattern.
adminb0dd10f2006-08-25 17:25:49 +0000[diff] [blame]67
68MVC is a software approach that separates application logic from presentation. In practice, it permits your web pages to contain minimal scripting since the presentation is separate from the PHP scripting.</p>
69
70<ul>
admine334c472006-10-21 19:44:22 +0000[diff] [blame]71<li>The <strong>Model</strong> represents your data structures. Typically your model classes will contains functions that help you
adminb0dd10f2006-08-25 17:25:49 +0000[diff] [blame]72retrieve, insert, and update information in your your database.</li>
73<li>The <strong>View</strong> is the information that is being presented to a user. A View will normally be a web page, but
admin25f6fca2006-09-23 01:23:14 +0000[diff] [blame]74in Code Igniter, a view can also be a page fragment like a header or footer. It can also be an RSS page, or any other type of "page".</li>
adminb0dd10f2006-08-25 17:25:49 +0000[diff] [blame]75<li>The <strong>Controller</strong> serves as an <em>intermediary</em> between the Model, the View,
76and any other resources needed to process the HTTP request and generate a web page.</li>
77
78</ul>
79
admine334c472006-10-21 19:44:22 +0000[diff] [blame]80<p>Code Igniter has a fairly loose approach to MVC since Models are not required.
adminb0dd10f2006-08-25 17:25:49 +0000[diff] [blame]81If you don't need the added separation, or find that maintaining models requires more complexity than you
admine334c472006-10-21 19:44:22 +0000[diff] [blame]82want, you can ignore them and build your application minimally using Controllers and Views. Code Igniter also
adminb0dd10f2006-08-25 17:25:49 +0000[diff] [blame]83enables you to incorporate your own existing scripts, or even develop core libraries for the system,
84 enabling you to work in a way that makes the most sense to you.</p>
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