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authorAndrey Andreev <narf@devilix.net>2019-09-19 14:08:45 +0200
committerAndrey Andreev <narf@devilix.net>2019-09-19 14:08:45 +0200
commitb73eb19aed66190c10c9cad476da7c36c271d6dc (patch)
treeb3d5d4f960569c30701934416d6d51628bde81a7 /user_guide/tutorial/news_section.html
parent6e052d80b95b9332ed592cdc3431b5f9dc8dd250 (diff)
[ci skip] 3.1.11 release
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+
+
+<!DOCTYPE html>
+<!--[if IE 8]><html class="no-js lt-ie9" lang="en" > <![endif]-->
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+ <title>News section &mdash; CodeIgniter 3.1.11 documentation</title>
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+ <link rel="up" title="Tutorial" href="index.html"/>
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+<li class="toctree-l2"><a class="reference internal" href="../overview/mvc.html">Model-View-Controller</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../overview/goals.html">Architectural Goals</a></li>
+</ul>
+</li>
+</ul>
+<ul class="current">
+<li class="toctree-l1 current"><a class="reference internal" href="index.html">Tutorial</a><ul class="current">
+<li class="toctree-l2"><a class="reference internal" href="static_pages.html">Static pages</a></li>
+<li class="toctree-l2 current"><a class="current reference internal" href="#">News section</a></li>
+<li class="toctree-l2"><a class="reference internal" href="create_news_items.html">Create news items</a></li>
+<li class="toctree-l2"><a class="reference internal" href="conclusion.html">Conclusion</a></li>
+</ul>
+</li>
+</ul>
+<ul>
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+<ul>
+<li class="toctree-l1"><a class="reference internal" href="../general/index.html">General Topics</a><ul>
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+<li class="toctree-l2"><a class="reference internal" href="../general/views.html">Views</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../general/models.html">Models</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../general/helpers.html">Helpers</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../general/libraries.html">Using CodeIgniter Libraries</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../general/creating_libraries.html">Creating Libraries</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../general/drivers.html">Using CodeIgniter Drivers</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../general/creating_drivers.html">Creating Drivers</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../general/core_classes.html">Creating Core System Classes</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../general/ancillary_classes.html">Creating Ancillary Classes</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../general/hooks.html">Hooks - Extending the Framework Core</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../general/autoloader.html">Auto-loading Resources</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../general/common_functions.html">Common Functions</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../general/compatibility_functions.html">Compatibility Functions</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../general/routing.html">URI Routing</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../general/errors.html">Error Handling</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../general/caching.html">Caching</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../general/profiling.html">Profiling Your Application</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../general/cli.html">Running via the CLI</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../general/managing_apps.html">Managing your Applications</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../general/environments.html">Handling Multiple Environments</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../general/alternative_php.html">Alternate PHP Syntax for View Files</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../general/security.html">Security</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../general/styleguide.html">PHP Style Guide</a></li>
+</ul>
+</li>
+</ul>
+<ul>
+<li class="toctree-l1"><a class="reference internal" href="../libraries/index.html">Libraries</a><ul>
+<li class="toctree-l2"><a class="reference internal" href="../libraries/benchmark.html">Benchmarking Class</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../libraries/caching.html">Caching Driver</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../libraries/calendar.html">Calendaring Class</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../libraries/cart.html">Shopping Cart Class</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../libraries/config.html">Config Class</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../libraries/email.html">Email Class</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../libraries/encrypt.html">Encrypt Class</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../libraries/encryption.html">Encryption Library</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../libraries/file_uploading.html">File Uploading Class</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../libraries/form_validation.html">Form Validation</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../libraries/ftp.html">FTP Class</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../libraries/image_lib.html">Image Manipulation Class</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../libraries/input.html">Input Class</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../libraries/javascript.html">Javascript Class</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../libraries/language.html">Language Class</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../libraries/loader.html">Loader Class</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../libraries/migration.html">Migrations Class</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../libraries/output.html">Output Class</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../libraries/pagination.html">Pagination Class</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../libraries/parser.html">Template Parser Class</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../libraries/security.html">Security Class</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../libraries/sessions.html">Session Library</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../libraries/table.html">HTML Table Class</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../libraries/trackback.html">Trackback Class</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../libraries/typography.html">Typography Class</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../libraries/unit_testing.html">Unit Testing Class</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../libraries/uri.html">URI Class</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../libraries/user_agent.html">User Agent Class</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../libraries/xmlrpc.html">XML-RPC and XML-RPC Server Classes</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../libraries/zip.html">Zip Encoding Class</a></li>
+</ul>
+</li>
+</ul>
+<ul>
+<li class="toctree-l1"><a class="reference internal" href="../database/index.html">Database Reference</a><ul>
+<li class="toctree-l2"><a class="reference internal" href="../database/examples.html">Quick Start: Usage Examples</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../database/configuration.html">Database Configuration</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../database/connecting.html">Connecting to a Database</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../database/queries.html">Running Queries</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../database/results.html">Generating Query Results</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../database/helpers.html">Query Helper Functions</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../database/query_builder.html">Query Builder Class</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../database/transactions.html">Transactions</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../database/metadata.html">Getting MetaData</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../database/call_function.html">Custom Function Calls</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../database/caching.html">Query Caching</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../database/forge.html">Database Manipulation with Database Forge</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../database/utilities.html">Database Utilities Class</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../database/db_driver_reference.html">Database Driver Reference</a></li>
+</ul>
+</li>
+</ul>
+<ul>
+<li class="toctree-l1"><a class="reference internal" href="../helpers/index.html">Helpers</a><ul>
+<li class="toctree-l2"><a class="reference internal" href="../helpers/array_helper.html">Array Helper</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../helpers/captcha_helper.html">CAPTCHA Helper</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../helpers/cookie_helper.html">Cookie Helper</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../helpers/date_helper.html">Date Helper</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../helpers/directory_helper.html">Directory Helper</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../helpers/download_helper.html">Download Helper</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../helpers/email_helper.html">Email Helper</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../helpers/file_helper.html">File Helper</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../helpers/form_helper.html">Form Helper</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../helpers/html_helper.html">HTML Helper</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../helpers/inflector_helper.html">Inflector Helper</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../helpers/language_helper.html">Language Helper</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../helpers/number_helper.html">Number Helper</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../helpers/path_helper.html">Path Helper</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../helpers/security_helper.html">Security Helper</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../helpers/smiley_helper.html">Smiley Helper</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../helpers/string_helper.html">String Helper</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../helpers/text_helper.html">Text Helper</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../helpers/typography_helper.html">Typography Helper</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../helpers/url_helper.html">URL Helper</a></li>
+<li class="toctree-l2"><a class="reference internal" href="../helpers/xml_helper.html">XML Helper</a></li>
+</ul>
+</li>
+</ul>
+
+
+
+ </div>
+ &nbsp;
+ </nav>
+
+ <section data-toggle="wy-nav-shift" class="wy-nav-content-wrap">
+
+
+ <nav class="wy-nav-top" role="navigation" aria-label="top navigation">
+ <i data-toggle="wy-nav-top" class="fa fa-bars"></i>
+ <a href="../index.html">CodeIgniter</a>
+ </nav>
+
+
+
+ <div class="wy-nav-content">
+ <div class="rst-content">
+ <div role="navigation" aria-label="breadcrumbs navigation">
+ <ul class="wy-breadcrumbs">
+ <li><a href="../index.html">Docs</a> &raquo;</li>
+
+ <li><a href="index.html">Tutorial</a> &raquo;</li>
+
+ <li>News section</li>
+ <li class="wy-breadcrumbs-aside">
+
+ </li>
+ <div style="float:right;margin-left:5px;" id="closeMe">
+ <img title="Classic Layout" alt="classic layout" src="data:image/gif;base64,R0lGODlhFAAUAJEAAAAAADMzM////wAAACH5BAUUAAIALAAAAAAUABQAAAImlI+py+0PU5gRBRDM3DxbWoXis42X13USOLauUIqnlsaH/eY6UwAAOw==" />
+ </div>
+ </ul>
+ <hr/>
+</div>
+ <div role="main" class="document">
+
+ <div class="section" id="news-section">
+<h1>News section<a class="headerlink" href="#news-section" title="Permalink to this headline">¶</a></h1>
+<p>In the last section, we went over some basic concepts of the framework
+by writing a class that includes static pages. We cleaned up the URI by
+adding custom routing rules. Now it’s time to introduce dynamic content
+and start using a database.</p>
+<div class="section" id="setting-up-your-model">
+<h2>Setting up your model<a class="headerlink" href="#setting-up-your-model" title="Permalink to this headline">¶</a></h2>
+<p>Instead of writing database operations right in the controller, queries
+should be placed in a model, so they can easily be reused later. Models
+are the place where you retrieve, insert, and update information in your
+database or other data stores. They represent your data.</p>
+<p>Open up the <em>application/models/</em> directory and create a new file called
+<em>News_model.php</em> and add the following code. Make sure you’ve configured
+your database properly as described <a class="reference internal" href="../database/configuration.html"><span class="doc">here</span></a>.</p>
+<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="o">&lt;?</span><span class="nx">php</span>
+<span class="k">class</span> <span class="nc">News_model</span> <span class="k">extends</span> <span class="nx">CI_Model</span> <span class="p">{</span>
+
+ <span class="k">public</span> <span class="k">function</span> <span class="nf">__construct</span><span class="p">()</span>
+ <span class="p">{</span>
+ <span class="nv">$this</span><span class="o">-&gt;</span><span class="na">load</span><span class="o">-&gt;</span><span class="na">database</span><span class="p">();</span>
+ <span class="p">}</span>
+<span class="p">}</span>
+</pre></div>
+</div>
+<p>This code looks similar to the controller code that was used earlier. It
+creates a new model by extending <code class="docutils literal"><span class="pre">CI_Model</span></code> and loads the database
+library. This will make the database class available through the
+<code class="docutils literal"><span class="pre">$this-&gt;db</span></code> object.</p>
+<p>Before querying the database, a database schema has to be created.
+Connect to your database and run the SQL command below (MySQL).
+Also add some seed records.</p>
+<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nx">CREATE</span> <span class="nx">TABLE</span> <span class="nx">news</span> <span class="p">(</span>
+ <span class="nx">id</span> <span class="nx">int</span><span class="p">(</span><span class="mi">11</span><span class="p">)</span> <span class="k">NOT</span> <span class="k">NULL</span> <span class="nx">AUTO_INCREMENT</span><span class="p">,</span>
+ <span class="nx">title</span> <span class="nx">varchar</span><span class="p">(</span><span class="mi">128</span><span class="p">)</span> <span class="k">NOT</span> <span class="k">NULL</span><span class="p">,</span>
+ <span class="nx">slug</span> <span class="nx">varchar</span><span class="p">(</span><span class="mi">128</span><span class="p">)</span> <span class="k">NOT</span> <span class="k">NULL</span><span class="p">,</span>
+ <span class="nx">text</span> <span class="nx">text</span> <span class="k">NOT</span> <span class="k">NULL</span><span class="p">,</span>
+ <span class="nx">PRIMARY</span> <span class="nx">KEY</span> <span class="p">(</span><span class="nx">id</span><span class="p">),</span>
+ <span class="nx">KEY</span> <span class="nx">slug</span> <span class="p">(</span><span class="nx">slug</span><span class="p">)</span>
+<span class="p">);</span>
+</pre></div>
+</div>
+<p>Now that the database and a model have been set up, you’ll need a method
+to get all of our posts from our database. To do this, the database
+abstraction layer that is included with CodeIgniter —
+<a class="reference internal" href="../database/query_builder.html"><span class="doc">Query Builder</span></a> — is used. This makes it
+possible to write your ‘queries’ once and make them work on <a class="reference internal" href="../general/requirements.html"><span class="doc">all
+supported database systems</span></a>. Add the
+following code to your model.</p>
+<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="k">public</span> <span class="k">function</span> <span class="nf">get_news</span><span class="p">(</span><span class="nv">$slug</span> <span class="o">=</span> <span class="k">FALSE</span><span class="p">)</span>
+<span class="p">{</span>
+ <span class="k">if</span> <span class="p">(</span><span class="nv">$slug</span> <span class="o">===</span> <span class="k">FALSE</span><span class="p">)</span>
+ <span class="p">{</span>
+ <span class="nv">$query</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-&gt;</span><span class="na">db</span><span class="o">-&gt;</span><span class="na">get</span><span class="p">(</span><span class="s1">&#39;news&#39;</span><span class="p">);</span>
+ <span class="k">return</span> <span class="nv">$query</span><span class="o">-&gt;</span><span class="na">result_array</span><span class="p">();</span>
+ <span class="p">}</span>
+
+ <span class="nv">$query</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-&gt;</span><span class="na">db</span><span class="o">-&gt;</span><span class="na">get_where</span><span class="p">(</span><span class="s1">&#39;news&#39;</span><span class="p">,</span> <span class="k">array</span><span class="p">(</span><span class="s1">&#39;slug&#39;</span> <span class="o">=&gt;</span> <span class="nv">$slug</span><span class="p">));</span>
+ <span class="k">return</span> <span class="nv">$query</span><span class="o">-&gt;</span><span class="na">row_array</span><span class="p">();</span>
+<span class="p">}</span>
+</pre></div>
+</div>
+<p>With this code you can perform two different queries. You can get all
+news records, or get a news item by its <a class="reference external" href="#">slug</a>. You might have
+noticed that the <code class="docutils literal"><span class="pre">$slug</span></code> variable wasn’t sanitized before running the
+query; <a class="reference internal" href="../database/query_builder.html"><span class="doc">Query Builder</span></a> does this for you.</p>
+</div>
+<div class="section" id="display-the-news">
+<h2>Display the news<a class="headerlink" href="#display-the-news" title="Permalink to this headline">¶</a></h2>
+<p>Now that the queries are written, the model should be tied to the views
+that are going to display the news items to the user. This could be done
+in our <code class="docutils literal"><span class="pre">Pages</span></code> controller created earlier, but for the sake of clarity,
+a new <code class="docutils literal"><span class="pre">News</span></code> controller is defined. Create the new controller at
+<em>application/controllers/News.php</em>.</p>
+<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="o">&lt;?</span><span class="nx">php</span>
+<span class="k">class</span> <span class="nc">News</span> <span class="k">extends</span> <span class="nx">CI_Controller</span> <span class="p">{</span>
+
+ <span class="k">public</span> <span class="k">function</span> <span class="nf">__construct</span><span class="p">()</span>
+ <span class="p">{</span>
+ <span class="k">parent</span><span class="o">::</span><span class="na">__construct</span><span class="p">();</span>
+ <span class="nv">$this</span><span class="o">-&gt;</span><span class="na">load</span><span class="o">-&gt;</span><span class="na">model</span><span class="p">(</span><span class="s1">&#39;news_model&#39;</span><span class="p">);</span>
+ <span class="nv">$this</span><span class="o">-&gt;</span><span class="na">load</span><span class="o">-&gt;</span><span class="na">helper</span><span class="p">(</span><span class="s1">&#39;url_helper&#39;</span><span class="p">);</span>
+ <span class="p">}</span>
+
+ <span class="k">public</span> <span class="k">function</span> <span class="nf">index</span><span class="p">()</span>
+ <span class="p">{</span>
+ <span class="nv">$data</span><span class="p">[</span><span class="s1">&#39;news&#39;</span><span class="p">]</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-&gt;</span><span class="na">news_model</span><span class="o">-&gt;</span><span class="na">get_news</span><span class="p">();</span>
+ <span class="p">}</span>
+
+ <span class="k">public</span> <span class="k">function</span> <span class="nf">view</span><span class="p">(</span><span class="nv">$slug</span> <span class="o">=</span> <span class="k">NULL</span><span class="p">)</span>
+ <span class="p">{</span>
+ <span class="nv">$data</span><span class="p">[</span><span class="s1">&#39;news_item&#39;</span><span class="p">]</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-&gt;</span><span class="na">news_model</span><span class="o">-&gt;</span><span class="na">get_news</span><span class="p">(</span><span class="nv">$slug</span><span class="p">);</span>
+ <span class="p">}</span>
+<span class="p">}</span>
+</pre></div>
+</div>
+<p>Looking at the code, you may see some similarity with the files we
+created earlier. First, the <code class="docutils literal"><span class="pre">__construct()</span></code> method: it calls the
+constructor of its parent class (<code class="docutils literal"><span class="pre">CI_Controller</span></code>) and loads the model,
+so it can be used in all other methods in this controller.
+It also loads a collection of <a class="reference internal" href="../helpers/url_helper.html"><span class="doc">URL Helper</span></a>
+functions, because we’ll use one of them in a view later.</p>
+<p>Next, there are two methods to view all news items and one for a specific
+news item. You can see that the <code class="docutils literal"><span class="pre">$slug</span></code> variable is passed to the model’s
+method in the second method. The model is using this slug to identify the
+news item to be returned.</p>
+<p>Now the data is retrieved by the controller through our model, but
+nothing is displayed yet. The next thing to do is passing this data to
+the views.</p>
+<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="k">public</span> <span class="k">function</span> <span class="nf">index</span><span class="p">()</span>
+<span class="p">{</span>
+ <span class="nv">$data</span><span class="p">[</span><span class="s1">&#39;news&#39;</span><span class="p">]</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-&gt;</span><span class="na">news_model</span><span class="o">-&gt;</span><span class="na">get_news</span><span class="p">();</span>
+ <span class="nv">$data</span><span class="p">[</span><span class="s1">&#39;title&#39;</span><span class="p">]</span> <span class="o">=</span> <span class="s1">&#39;News archive&#39;</span><span class="p">;</span>
+
+ <span class="nv">$this</span><span class="o">-&gt;</span><span class="na">load</span><span class="o">-&gt;</span><span class="na">view</span><span class="p">(</span><span class="s1">&#39;templates/header&#39;</span><span class="p">,</span> <span class="nv">$data</span><span class="p">);</span>
+ <span class="nv">$this</span><span class="o">-&gt;</span><span class="na">load</span><span class="o">-&gt;</span><span class="na">view</span><span class="p">(</span><span class="s1">&#39;news/index&#39;</span><span class="p">,</span> <span class="nv">$data</span><span class="p">);</span>
+ <span class="nv">$this</span><span class="o">-&gt;</span><span class="na">load</span><span class="o">-&gt;</span><span class="na">view</span><span class="p">(</span><span class="s1">&#39;templates/footer&#39;</span><span class="p">);</span>
+<span class="p">}</span>
+</pre></div>
+</div>
+<p>The code above gets all news records from the model and assigns it to a
+variable. The value for the title is also assigned to the <code class="docutils literal"><span class="pre">$data['title']</span></code>
+element and all data is passed to the views. You now need to create a
+view to render the news items. Create <em>application/views/news/index.php</em>
+and add the next piece of code.</p>
+<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="o">&lt;</span><span class="nx">h2</span><span class="o">&gt;&lt;?</span><span class="nx">php</span> <span class="k">echo</span> <span class="nv">$title</span><span class="p">;</span> <span class="cp">?&gt;</span><span class="p">&lt;/</span><span class="nt">h2</span><span class="p">&gt;</span>
+
+<span class="cp">&lt;?php</span> <span class="k">foreach</span> <span class="p">(</span><span class="nv">$news</span> <span class="k">as</span> <span class="nv">$news_item</span><span class="p">)</span><span class="o">:</span> <span class="cp">?&gt;</span>
+
+ <span class="p">&lt;</span><span class="nt">h3</span><span class="p">&gt;</span><span class="cp">&lt;?php</span> <span class="k">echo</span> <span class="nv">$news_item</span><span class="p">[</span><span class="s1">&#39;title&#39;</span><span class="p">];</span> <span class="cp">?&gt;</span><span class="p">&lt;/</span><span class="nt">h3</span><span class="p">&gt;</span>
+ <span class="p">&lt;</span><span class="nt">div</span> <span class="na">class</span><span class="o">=</span><span class="s">&quot;main&quot;</span><span class="p">&gt;</span>
+ <span class="cp">&lt;?php</span> <span class="k">echo</span> <span class="nv">$news_item</span><span class="p">[</span><span class="s1">&#39;text&#39;</span><span class="p">];</span> <span class="cp">?&gt;</span>
+ <span class="p">&lt;/</span><span class="nt">div</span><span class="p">&gt;</span>
+ <span class="p">&lt;</span><span class="nt">p</span><span class="p">&gt;&lt;</span><span class="nt">a</span> <span class="na">href</span><span class="o">=</span><span class="s">&quot;</span><span class="cp">&lt;?php</span> <span class="k">echo</span> <span class="nx">site_url</span><span class="p">(</span><span class="s1">&#39;news/&#39;</span><span class="o">.</span><span class="nv">$news_item</span><span class="p">[</span><span class="s1">&#39;slug&#39;</span><span class="p">]);</span> <span class="cp">?&gt;</span><span class="s">&quot;</span><span class="p">&gt;</span>View article<span class="p">&lt;/</span><span class="nt">a</span><span class="p">&gt;&lt;/</span><span class="nt">p</span><span class="p">&gt;</span>
+
+<span class="cp">&lt;?php</span> <span class="k">endforeach</span><span class="p">;</span> <span class="cp">?&gt;</span>
+</pre></div>
+</div>
+<p>Here, each news item is looped and displayed to the user. You can see we
+wrote our template in PHP mixed with HTML. If you prefer to use a template
+language, you can use CodeIgniter’s <a class="reference internal" href="../libraries/parser.html"><span class="doc">Template
+Parser</span></a> class or a third party parser.</p>
+<p>The news overview page is now done, but a page to display individual
+news items is still absent. The model created earlier is made in such
+way that it can easily be used for this functionality. You only need to
+add some code to the controller and create a new view. Go back to the
+<code class="docutils literal"><span class="pre">News</span></code> controller and update <code class="docutils literal"><span class="pre">view()</span></code> with the following:</p>
+<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="k">public</span> <span class="k">function</span> <span class="nf">view</span><span class="p">(</span><span class="nv">$slug</span> <span class="o">=</span> <span class="k">NULL</span><span class="p">)</span>
+<span class="p">{</span>
+ <span class="nv">$data</span><span class="p">[</span><span class="s1">&#39;news_item&#39;</span><span class="p">]</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-&gt;</span><span class="na">news_model</span><span class="o">-&gt;</span><span class="na">get_news</span><span class="p">(</span><span class="nv">$slug</span><span class="p">);</span>
+
+ <span class="k">if</span> <span class="p">(</span><span class="k">empty</span><span class="p">(</span><span class="nv">$data</span><span class="p">[</span><span class="s1">&#39;news_item&#39;</span><span class="p">]))</span>
+ <span class="p">{</span>
+ <span class="nx">show_404</span><span class="p">();</span>
+ <span class="p">}</span>
+
+ <span class="nv">$data</span><span class="p">[</span><span class="s1">&#39;title&#39;</span><span class="p">]</span> <span class="o">=</span> <span class="nv">$data</span><span class="p">[</span><span class="s1">&#39;news_item&#39;</span><span class="p">][</span><span class="s1">&#39;title&#39;</span><span class="p">];</span>
+
+ <span class="nv">$this</span><span class="o">-&gt;</span><span class="na">load</span><span class="o">-&gt;</span><span class="na">view</span><span class="p">(</span><span class="s1">&#39;templates/header&#39;</span><span class="p">,</span> <span class="nv">$data</span><span class="p">);</span>
+ <span class="nv">$this</span><span class="o">-&gt;</span><span class="na">load</span><span class="o">-&gt;</span><span class="na">view</span><span class="p">(</span><span class="s1">&#39;news/view&#39;</span><span class="p">,</span> <span class="nv">$data</span><span class="p">);</span>
+ <span class="nv">$this</span><span class="o">-&gt;</span><span class="na">load</span><span class="o">-&gt;</span><span class="na">view</span><span class="p">(</span><span class="s1">&#39;templates/footer&#39;</span><span class="p">);</span>
+<span class="p">}</span>
+</pre></div>
+</div>
+<p>Instead of calling the <code class="docutils literal"><span class="pre">get_news()</span></code> method without a parameter, the
+<code class="docutils literal"><span class="pre">$slug</span></code> variable is passed, so it will return the specific news item.
+The only things left to do is create the corresponding view at
+<em>application/views/news/view.php</em>. Put the following code in this file.</p>
+<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="o">&lt;?</span><span class="nx">php</span>
+<span class="k">echo</span> <span class="s1">&#39;&lt;h2&gt;&#39;</span><span class="o">.</span><span class="nv">$news_item</span><span class="p">[</span><span class="s1">&#39;title&#39;</span><span class="p">]</span><span class="o">.</span><span class="s1">&#39;&lt;/h2&gt;&#39;</span><span class="p">;</span>
+<span class="k">echo</span> <span class="nv">$news_item</span><span class="p">[</span><span class="s1">&#39;text&#39;</span><span class="p">];</span>
+</pre></div>
+</div>
+</div>
+<div class="section" id="routing">
+<h2>Routing<a class="headerlink" href="#routing" title="Permalink to this headline">¶</a></h2>
+<p>Because of the wildcard routing rule created earlier, you need an extra
+route to view the controller that you just made. Modify your routing file
+(<em>application/config/routes.php</em>) so it looks as follows.
+This makes sure the requests reaches the <code class="docutils literal"><span class="pre">News</span></code> controller instead of
+going directly to the <code class="docutils literal"><span class="pre">Pages</span></code> controller. The first line routes URI’s
+with a slug to the <code class="docutils literal"><span class="pre">view()</span></code> method in the <code class="docutils literal"><span class="pre">News</span></code> controller.</p>
+<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$route</span><span class="p">[</span><span class="s1">&#39;news/(:any)&#39;</span><span class="p">]</span> <span class="o">=</span> <span class="s1">&#39;news/view/$1&#39;</span><span class="p">;</span>
+<span class="nv">$route</span><span class="p">[</span><span class="s1">&#39;news&#39;</span><span class="p">]</span> <span class="o">=</span> <span class="s1">&#39;news&#39;</span><span class="p">;</span>
+<span class="nv">$route</span><span class="p">[</span><span class="s1">&#39;(:any)&#39;</span><span class="p">]</span> <span class="o">=</span> <span class="s1">&#39;pages/view/$1&#39;</span><span class="p">;</span>
+<span class="nv">$route</span><span class="p">[</span><span class="s1">&#39;default_controller&#39;</span><span class="p">]</span> <span class="o">=</span> <span class="s1">&#39;pages/view&#39;</span><span class="p">;</span>
+</pre></div>
+</div>
+<p>Point your browser to your document root, followed by index.php/news and
+watch your news page.</p>
+</div>
+</div>
+
+
+ </div>
+ <footer>
+
+ <div class="rst-footer-buttons" role="navigation" aria-label="footer navigation">
+
+ <a href="create_news_items.html" class="btn btn-neutral float-right" title="Create news items">Next <span class="fa fa-arrow-circle-right"></span></a>
+
+
+ <a href="static_pages.html" class="btn btn-neutral" title="Static pages"><span class="fa fa-arrow-circle-left"></span> Previous</a>
+
+ </div>
+
+
+ <hr/>
+
+ <div role="contentinfo">
+ <p>
+ &copy; Copyright 2014 - 2019, British Columbia Institute of Technology.
+ Last updated on Sep 19, 2019.
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+
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