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| <li class="toctree-l2"><a class="reference internal" href="../libraries/table.html">HTML Table Class</a></li> |
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| <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> |
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| <li class="toctree-l2"><a class="reference internal" href="../database/queries.html">Running Queries</a></li> |
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| <li class="toctree-l2"><a class="reference internal" href="../database/query_builder.html">Query Builder Class</a></li> |
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| <li class="toctree-l2"><a class="reference internal" href="../helpers/xml_helper.html">XML Helper</a></li> |
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| <div class="section" id="codeigniter-at-a-glance"> |
| <h1>CodeIgniter at a Glance<a class="headerlink" href="#codeigniter-at-a-glance" title="Permalink to this headline">¶</a></h1> |
| <div class="section" id="codeigniter-is-an-application-framework"> |
| <h2>CodeIgniter is an Application Framework<a class="headerlink" href="#codeigniter-is-an-application-framework" title="Permalink to this headline">¶</a></h2> |
| <p>CodeIgniter is a toolkit for people who build web applications using |
| PHP. Its goal is to enable you to develop projects much faster than you |
| could if you were writing code from scratch, by providing a rich set of |
| libraries for commonly needed tasks, as well as a simple interface and |
| logical structure to access these libraries. CodeIgniter lets you |
| creatively focus on your project by minimizing the amount of code needed |
| for a given task.</p> |
| </div> |
| <div class="section" id="codeigniter-is-free"> |
| <h2>CodeIgniter is Free<a class="headerlink" href="#codeigniter-is-free" title="Permalink to this headline">¶</a></h2> |
| <p>CodeIgniter is licensed under the MIT license so you can use it however |
| you please. For more information please read the |
| <a class="reference internal" href="../license.html"><span class="doc">license agreement</span></a>.</p> |
| </div> |
| <div class="section" id="codeigniter-is-light-weight"> |
| <h2>CodeIgniter is Light Weight<a class="headerlink" href="#codeigniter-is-light-weight" title="Permalink to this headline">¶</a></h2> |
| <p>Truly light weight. The core system requires only a few very small |
| libraries. This is in stark contrast to many frameworks that require |
| significantly more resources. Additional libraries are loaded |
| dynamically upon request, based on your needs for a given process, so |
| the base system is very lean and quite fast.</p> |
| </div> |
| <div class="section" id="codeigniter-is-fast"> |
| <h2>CodeIgniter is Fast<a class="headerlink" href="#codeigniter-is-fast" title="Permalink to this headline">¶</a></h2> |
| <p>Really fast. We challenge you to find a framework that has better |
| performance than CodeIgniter.</p> |
| </div> |
| <div class="section" id="codeigniter-uses-m-v-c"> |
| <h2>CodeIgniter Uses M-V-C<a class="headerlink" href="#codeigniter-uses-m-v-c" title="Permalink to this headline">¶</a></h2> |
| <p>CodeIgniter uses the Model-View-Controller approach, which allows great |
| separation between logic and presentation. This is particularly good for |
| projects in which designers are working with your template files, as the |
| code these files contain will be minimized. We describe MVC in more |
| detail on its own page.</p> |
| </div> |
| <div class="section" id="codeigniter-generates-clean-urls"> |
| <h2>CodeIgniter Generates Clean URLs<a class="headerlink" href="#codeigniter-generates-clean-urls" title="Permalink to this headline">¶</a></h2> |
| <p>The URLs generated by CodeIgniter are clean and search-engine friendly. |
| Rather than using the standard “query string” approach to URLs that is |
| synonymous with dynamic systems, CodeIgniter uses a segment-based |
| approach:</p> |
| <div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nx">example</span><span class="o">.</span><span class="nx">com</span><span class="o">/</span><span class="nx">news</span><span class="o">/</span><span class="nx">article</span><span class="o">/</span><span class="mi">345</span> |
| </pre></div> |
| </div> |
| <div class="admonition note"> |
| <p class="first admonition-title">Note</p> |
| <p class="last">By default the <em>index.php</em> file is included in the URL but it can |
| be removed using a simple <em>.htaccess</em> file.</p> |
| </div> |
| </div> |
| <div class="section" id="codeigniter-packs-a-punch"> |
| <h2>CodeIgniter Packs a Punch<a class="headerlink" href="#codeigniter-packs-a-punch" title="Permalink to this headline">¶</a></h2> |
| <p>CodeIgniter comes with full-range of libraries that enable the most |
| commonly needed web development tasks, like accessing a database, |
| sending email, validating form data, maintaining sessions, manipulating |
| images, working with XML-RPC data and much more.</p> |
| </div> |
| <div class="section" id="codeigniter-is-extensible"> |
| <h2>CodeIgniter is Extensible<a class="headerlink" href="#codeigniter-is-extensible" title="Permalink to this headline">¶</a></h2> |
| <p>The system can be easily extended through the use of your own libraries, |
| helpers, or through class extensions or system hooks.</p> |
| </div> |
| <div class="section" id="codeigniter-does-not-require-a-template-engine"> |
| <h2>CodeIgniter Does Not Require a Template Engine<a class="headerlink" href="#codeigniter-does-not-require-a-template-engine" title="Permalink to this headline">¶</a></h2> |
| <p>Although CodeIgniter <em>does</em> come with a simple template parser that can |
| be optionally used, it does not force you to use one. Template engines |
| simply can not match the performance of native PHP, and the syntax that |
| must be learned to use a template engine is usually only marginally |
| easier than learning the basics of PHP. Consider this block of PHP code:</p> |
| <div class="highlight-ci"><div class="highlight"><pre><span></span><span class="o"><</span><span class="nx">ul</span><span class="o">></span> |
| <span class="o"><?</span><span class="nx">php</span> <span class="k">foreach</span> <span class="p">(</span><span class="nv">$addressbook</span> <span class="k">as</span> <span class="nv">$name</span><span class="p">)</span><span class="o">:</span><span class="cp">?></span> |
| <span class="p"><</span><span class="nt">li</span><span class="p">></span><span class="cp"><?</span><span class="o">=</span><span class="nv">$name</span><span class="cp">?></span><span class="p"></</span><span class="nt">li</span><span class="p">></span> |
| <span class="cp"><?php</span> <span class="k">endforeach</span><span class="p">;</span> <span class="cp">?></span> |
| <span class="p"></</span><span class="nt">ul</span><span class="p">></span> |
| </pre></div> |
| </div> |
| <p>Contrast this with the pseudo-code used by a template engine:</p> |
| <div class="highlight-ci"><div class="highlight"><pre><span></span><span class="o"><</span><span class="nx">ul</span><span class="o">></span> |
| <span class="p">{</span><span class="k">foreach</span> <span class="nx">from</span><span class="o">=</span><span class="nv">$addressbook</span> <span class="nx">item</span><span class="o">=</span><span class="s2">"name"</span><span class="p">}</span> |
| <span class="o"><</span><span class="nx">li</span><span class="o">></span><span class="p">{</span><span class="nv">$name</span><span class="p">}</span><span class="o"></</span><span class="nx">li</span><span class="o">></span> |
| <span class="p">{</span><span class="o">/</span><span class="k">foreach</span><span class="p">}</span> |
| <span class="o"></</span><span class="nx">ul</span><span class="o">></span> |
| </pre></div> |
| </div> |
| <p>Yes, the template engine example is a bit cleaner, but it comes at the |
| price of performance, as the pseudo-code must be converted back into PHP |
| to run. Since one of our goals is <em>maximum performance</em>, we opted to not |
| require the use of a template engine.</p> |
| </div> |
| <div class="section" id="codeigniter-is-thoroughly-documented"> |
| <h2>CodeIgniter is Thoroughly Documented<a class="headerlink" href="#codeigniter-is-thoroughly-documented" title="Permalink to this headline">¶</a></h2> |
| <p>Programmers love to code and hate to write documentation. We’re no |
| different, of course, but since documentation is <strong>as important</strong> as the |
| code itself, we are committed to doing it. Our source code is extremely |
| clean and well commented as well.</p> |
| </div> |
| <div class="section" id="codeigniter-has-a-friendly-community-of-users"> |
| <h2>CodeIgniter has a Friendly Community of Users<a class="headerlink" href="#codeigniter-has-a-friendly-community-of-users" title="Permalink to this headline">¶</a></h2> |
| <p>Our growing community of users can be seen actively participating in our |
| <a class="reference external" href="http://forum.codeigniter.com/">Community Forums</a>.</p> |
| </div> |
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| Last updated on Jan 16, 2019. |
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