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| <h1>Model-View-Controller<a class="headerlink" href="#model-view-controller" title="Permalink to this headline">¶</a></h1> |
| <p>CodeIgniter is based on the Model-View-Controller development pattern. |
| MVC 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> |
| <ul class="simple"> |
| <li>The <strong>Model</strong> represents your data structures. Typically your model |
| classes will contain functions that help you retrieve, insert, and |
| update information in your database.</li> |
| <li>The <strong>View</strong> is the information that is being presented to a user. A |
| View will normally be a web page, but in CodeIgniter, 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> |
| <li>The <strong>Controller</strong> serves as an <em>intermediary</em> between the Model, the |
| View, and any other resources needed to process the HTTP request and |
| generate a web page.</li> |
| </ul> |
| <p>CodeIgniter has a fairly loose approach to MVC since Models are not |
| required. If you don’t need the added separation, or find that |
| maintaining models requires more complexity than you want, you can |
| ignore them and build your application minimally using Controllers and |
| Views. CodeIgniter also enables you to incorporate your own existing |
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