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- <div class="section" id="config-class">
-<h1>Config Class<a class="headerlink" href="#config-class" title="Permalink to this headline">¶</a></h1>
-<p>The Config class provides a means to retrieve configuration preferences.
-These preferences can come from the default config file
-(application/config/config.php) or from your own custom config files.</p>
-<div class="admonition note">
-<p class="first admonition-title">Note</p>
-<p class="last">This class is initialized automatically by the system so there
-is no need to do it manually.</p>
-</div>
-<div class="contents local topic" id="contents">
-<ul class="simple">
-<li><a class="reference internal" href="#working-with-the-config-class" id="id1">Working with the Config Class</a><ul>
-<li><a class="reference internal" href="#anatomy-of-a-config-file" id="id2">Anatomy of a Config File</a></li>
-<li><a class="reference internal" href="#loading-a-config-file" id="id3">Loading a Config File</a><ul>
-<li><a class="reference internal" href="#manual-loading" id="id4">Manual Loading</a></li>
-<li><a class="reference internal" href="#auto-loading" id="id5">Auto-loading</a></li>
-</ul>
-</li>
-<li><a class="reference internal" href="#fetching-config-items" id="id6">Fetching Config Items</a></li>
-<li><a class="reference internal" href="#setting-a-config-item" id="id7">Setting a Config Item</a></li>
-<li><a class="reference internal" href="#environments" id="id8">Environments</a></li>
-</ul>
-</li>
-<li><a class="reference internal" href="#class-reference" id="id9">Class Reference</a></li>
-</ul>
-</div>
-<div class="custom-index container"></div><div class="section" id="working-with-the-config-class">
-<h2><a class="toc-backref" href="#id1">Working with the Config Class</a><a class="headerlink" href="#working-with-the-config-class" title="Permalink to this headline">¶</a></h2>
-<div class="section" id="anatomy-of-a-config-file">
-<h3><a class="toc-backref" href="#id2">Anatomy of a Config File</a><a class="headerlink" href="#anatomy-of-a-config-file" title="Permalink to this headline">¶</a></h3>
-<p>By default, CodeIgniter has one primary config file, located at
-application/config/config.php. If you open the file using your text
-editor you’ll see that config items are stored in an array called
-$config.</p>
-<p>You can add your own config items to this file, or if you prefer to keep
-your configuration items separate (assuming you even need config items),
-simply create your own file and save it in config folder.</p>
-<div class="admonition note">
-<p class="first admonition-title">Note</p>
-<p class="last">If you do create your own config files use the same format as
-the primary one, storing your items in an array called $config.
-CodeIgniter will intelligently manage these files so there will be no
-conflict even though the array has the same name (assuming an array
-index is not named the same as another).</p>
-</div>
-</div>
-<div class="section" id="loading-a-config-file">
-<h3><a class="toc-backref" href="#id3">Loading a Config File</a><a class="headerlink" href="#loading-a-config-file" title="Permalink to this headline">¶</a></h3>
-<div class="admonition note">
-<p class="first admonition-title">Note</p>
-<p class="last">CodeIgniter automatically loads the primary config file
-(application/config/config.php), so you will only need to load a config
-file if you have created your own.</p>
-</div>
-<p>There are two ways to load a config file:</p>
-<div class="section" id="manual-loading">
-<h4><a class="toc-backref" href="#id4">Manual Loading</a><a class="headerlink" href="#manual-loading" title="Permalink to this headline">¶</a></h4>
-<p>To load one of your custom config files you will use the following
-function within the <a class="reference internal" href="../general/controllers.html"><span class="doc">controller</span></a> that
-needs it:</p>
-<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-&gt;</span><span class="na">config</span><span class="o">-&gt;</span><span class="na">load</span><span class="p">(</span><span class="s1">&#39;filename&#39;</span><span class="p">);</span>
-</pre></div>
-</div>
-<p>Where filename is the name of your config file, without the .php file
-extension.</p>
-<p>If you need to load multiple config files normally they will be
-merged into one master config array. Name collisions can occur,
-however, if you have identically named array indexes in different
-config files. To avoid collisions you can set the second parameter to
-TRUE and each config file will be stored in an array index
-corresponding to the name of the config file. Example:</p>
-<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="c1">// Stored in an array with this prototype: $this-&gt;config[&#39;blog_settings&#39;] = $config</span>
-<span class="nv">$this</span><span class="o">-&gt;</span><span class="na">config</span><span class="o">-&gt;</span><span class="na">load</span><span class="p">(</span><span class="s1">&#39;blog_settings&#39;</span><span class="p">,</span> <span class="k">TRUE</span><span class="p">);</span>
-</pre></div>
-</div>
-<p>Please see the section entitled Fetching Config Items below to learn
-how to retrieve config items set this way.</p>
-<p>The third parameter allows you to suppress errors in the event that a
-config file does not exist:</p>
-<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-&gt;</span><span class="na">config</span><span class="o">-&gt;</span><span class="na">load</span><span class="p">(</span><span class="s1">&#39;blog_settings&#39;</span><span class="p">,</span> <span class="k">FALSE</span><span class="p">,</span> <span class="k">TRUE</span><span class="p">);</span>
-</pre></div>
-</div>
-</div>
-<div class="section" id="auto-loading">
-<h4><a class="toc-backref" href="#id5">Auto-loading</a><a class="headerlink" href="#auto-loading" title="Permalink to this headline">¶</a></h4>
-<p>If you find that you need a particular config file globally, you can
-have it loaded automatically by the system. To do this, open the
-<strong>autoload.php</strong> file, located at application/config/autoload.php,
-and add your config file as indicated in the file.</p>
-</div>
-</div>
-<div class="section" id="fetching-config-items">
-<h3><a class="toc-backref" href="#id6">Fetching Config Items</a><a class="headerlink" href="#fetching-config-items" title="Permalink to this headline">¶</a></h3>
-<p>To retrieve an item from your config file, use the following function:</p>
-<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-&gt;</span><span class="na">config</span><span class="o">-&gt;</span><span class="na">item</span><span class="p">(</span><span class="s1">&#39;item_name&#39;</span><span class="p">);</span>
-</pre></div>
-</div>
-<p>Where item_name is the $config array index you want to retrieve. For
-example, to fetch your language choice you’ll do this:</p>
-<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$lang</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-&gt;</span><span class="na">config</span><span class="o">-&gt;</span><span class="na">item</span><span class="p">(</span><span class="s1">&#39;language&#39;</span><span class="p">);</span>
-</pre></div>
-</div>
-<p>The function returns NULL if the item you are trying to fetch
-does not exist.</p>
-<p>If you are using the second parameter of the $this-&gt;config-&gt;load
-function in order to assign your config items to a specific index you
-can retrieve it by specifying the index name in the second parameter of
-the $this-&gt;config-&gt;item() function. Example:</p>
-<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="c1">// Loads a config file named blog_settings.php and assigns it to an index named &quot;blog_settings&quot;</span>
-<span class="nv">$this</span><span class="o">-&gt;</span><span class="na">config</span><span class="o">-&gt;</span><span class="na">load</span><span class="p">(</span><span class="s1">&#39;blog_settings&#39;</span><span class="p">,</span> <span class="k">TRUE</span><span class="p">);</span>
-
-<span class="c1">// Retrieve a config item named site_name contained within the blog_settings array</span>
-<span class="nv">$site_name</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-&gt;</span><span class="na">config</span><span class="o">-&gt;</span><span class="na">item</span><span class="p">(</span><span class="s1">&#39;site_name&#39;</span><span class="p">,</span> <span class="s1">&#39;blog_settings&#39;</span><span class="p">);</span>
-
-<span class="c1">// An alternate way to specify the same item:</span>
-<span class="nv">$blog_config</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-&gt;</span><span class="na">config</span><span class="o">-&gt;</span><span class="na">item</span><span class="p">(</span><span class="s1">&#39;blog_settings&#39;</span><span class="p">);</span>
-<span class="nv">$site_name</span> <span class="o">=</span> <span class="nv">$blog_config</span><span class="p">[</span><span class="s1">&#39;site_name&#39;</span><span class="p">];</span>
-</pre></div>
-</div>
-</div>
-<div class="section" id="setting-a-config-item">
-<h3><a class="toc-backref" href="#id7">Setting a Config Item</a><a class="headerlink" href="#setting-a-config-item" title="Permalink to this headline">¶</a></h3>
-<p>If you would like to dynamically set a config item or change an existing
-one, you can do so using:</p>
-<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-&gt;</span><span class="na">config</span><span class="o">-&gt;</span><span class="na">set_item</span><span class="p">(</span><span class="s1">&#39;item_name&#39;</span><span class="p">,</span> <span class="s1">&#39;item_value&#39;</span><span class="p">);</span>
-</pre></div>
-</div>
-<p>Where item_name is the $config array index you want to change, and
-item_value is its value.</p>
-</div>
-<div class="section" id="environments">
-<span id="config-environments"></span><h3><a class="toc-backref" href="#id8">Environments</a><a class="headerlink" href="#environments" title="Permalink to this headline">¶</a></h3>
-<p>You may load different configuration files depending on the current
-environment. The ENVIRONMENT constant is defined in index.php, and is
-described in detail in the <a class="reference internal" href="../general/environments.html"><span class="doc">Handling
-Environments</span></a> section.</p>
-<p>To create an environment-specific configuration file, create or copy a
-configuration file in application/config/{ENVIRONMENT}/{FILENAME}.php</p>
-<p>For example, to create a production-only config.php, you would:</p>
-<ol class="arabic simple">
-<li>Create the directory application/config/production/</li>
-<li>Copy your existing config.php into the above directory</li>
-<li>Edit application/config/production/config.php so it contains your
-production settings</li>
-</ol>
-<p>When you set the ENVIRONMENT constant to ‘production’, the settings for
-your new production-only config.php will be loaded.</p>
-<p>You can place the following configuration files in environment-specific
-folders:</p>
-<ul class="simple">
-<li>Default CodeIgniter configuration files</li>
-<li>Your own custom configuration files</li>
-</ul>
-<div class="admonition note">
-<p class="first admonition-title">Note</p>
-<p class="last">CodeIgniter always loads the global config file first (i.e., the one in application/config/),
-then tries to load the configuration files for the current environment.
-This means you are not obligated to place <strong>all</strong> of your configuration files in an
-environment folder. Only the files that change per environment. Additionally you don’t
-have to copy <strong>all</strong> the config items in the environment config file. Only the config items
-that you wish to change for your environment. The config items declared in your environment
-folders always overwrite those in your global config files.</p>
-</div>
-</div>
-</div>
-<div class="section" id="class-reference">
-<h2><a class="toc-backref" href="#id9">Class Reference</a><a class="headerlink" href="#class-reference" title="Permalink to this headline">¶</a></h2>
-<dl class="class">
-<dt id="CI_Config">
-<em class="property">class </em><code class="descname">CI_Config</code><a class="headerlink" href="#CI_Config" title="Permalink to this definition">¶</a></dt>
-<dd><dl class="attribute">
-<dt>
-<code class="descname">$config</code></dt>
-<dd><p>Array of all loaded config values</p>
-</dd></dl>
-
-<dl class="attribute">
-<dt>
-<code class="descname">$is_loaded</code></dt>
-<dd><p>Array of all loaded config files</p>
-</dd></dl>
-
-<dl class="method">
-<dt id="CI_Config::item">
-<code class="descname">item</code><span class="sig-paren">(</span><em>$item</em><span class="optional">[</span>, <em>$index=''</em><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_Config::item" title="Permalink to this definition">¶</a></dt>
-<dd><table class="docutils field-list" frame="void" rules="none">
-<col class="field-name" />
-<col class="field-body" />
-<tbody valign="top">
-<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple">
-<li><strong>$item</strong> (<em>string</em>) – Config item name</li>
-<li><strong>$index</strong> (<em>string</em>) – Index name</li>
-</ul>
-</td>
-</tr>
-<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">Config item value or NULL if not found</p>
-</td>
-</tr>
-<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">mixed</p>
-</td>
-</tr>
-</tbody>
-</table>
-<p>Fetch a config file item.</p>
-</dd></dl>
-
-<dl class="method">
-<dt id="CI_Config::set_item">
-<code class="descname">set_item</code><span class="sig-paren">(</span><em>$item</em>, <em>$value</em><span class="sig-paren">)</span><a class="headerlink" href="#CI_Config::set_item" title="Permalink to this definition">¶</a></dt>
-<dd><table class="docutils field-list" frame="void" rules="none">
-<col class="field-name" />
-<col class="field-body" />
-<tbody valign="top">
-<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple">
-<li><strong>$item</strong> (<em>string</em>) – Config item name</li>
-<li><strong>$value</strong> (<em>string</em>) – Config item value</li>
-</ul>
-</td>
-</tr>
-<tr class="field-even field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">void</p>
-</td>
-</tr>
-</tbody>
-</table>
-<p>Sets a config file item to the specified value.</p>
-</dd></dl>
-
-<dl class="method">
-<dt id="CI_Config::slash_item">
-<code class="descname">slash_item</code><span class="sig-paren">(</span><em>$item</em><span class="sig-paren">)</span><a class="headerlink" href="#CI_Config::slash_item" title="Permalink to this definition">¶</a></dt>
-<dd><table class="docutils field-list" frame="void" rules="none">
-<col class="field-name" />
-<col class="field-body" />
-<tbody valign="top">
-<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple">
-<li><strong>$item</strong> (<em>string</em>) – config item name</li>
-</ul>
-</td>
-</tr>
-<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">Config item value with a trailing forward slash or NULL if not found</p>
-</td>
-</tr>
-<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">mixed</p>
-</td>
-</tr>
-</tbody>
-</table>
-<p>This method is identical to <code class="docutils literal"><span class="pre">item()</span></code>, except it appends a forward
-slash to the end of the item, if it exists.</p>
-</dd></dl>
-
-<dl class="method">
-<dt id="CI_Config::load">
-<code class="descname">load</code><span class="sig-paren">(</span><span class="optional">[</span><em>$file = ''</em><span class="optional">[</span>, <em>$use_sections = FALSE</em><span class="optional">[</span>, <em>$fail_gracefully = FALSE</em><span class="optional">]</span><span class="optional">]</span><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_Config::load" title="Permalink to this definition">¶</a></dt>
-<dd><table class="docutils field-list" frame="void" rules="none">
-<col class="field-name" />
-<col class="field-body" />
-<tbody valign="top">
-<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple">
-<li><strong>$file</strong> (<em>string</em>) – Configuration file name</li>
-<li><strong>$use_sections</strong> (<em>bool</em>) – Whether config values should be loaded into their own section (index of the main config array)</li>
-<li><strong>$fail_gracefully</strong> (<em>bool</em>) – Whether to return FALSE or to display an error message</li>
-</ul>
-</td>
-</tr>
-<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">TRUE on success, FALSE on failure</p>
-</td>
-</tr>
-<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">bool</p>
-</td>
-</tr>
-</tbody>
-</table>
-<p>Loads a configuration file.</p>
-</dd></dl>
-
-<dl class="method">
-<dt id="CI_Config::site_url">
-<code class="descname">site_url</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_Config::site_url" title="Permalink to this definition">¶</a></dt>
-<dd><table class="docutils field-list" frame="void" rules="none">
-<col class="field-name" />
-<col class="field-body" />
-<tbody valign="top">
-<tr class="field-odd field"><th class="field-name">Returns:</th><td class="field-body">Site URL</td>
-</tr>
-<tr class="field-even field"><th class="field-name">Return type:</th><td class="field-body">string</td>
-</tr>
-</tbody>
-</table>
-<p>This method retrieves the URL to your site, along with the “index” value
-you’ve specified in the config file.</p>
-<p>This method is normally accessed via the corresponding functions in the
-<a class="reference internal" href="../helpers/url_helper.html"><span class="doc">URL Helper</span></a>.</p>
-</dd></dl>
-
-<dl class="method">
-<dt id="CI_Config::base_url">
-<code class="descname">base_url</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_Config::base_url" title="Permalink to this definition">¶</a></dt>
-<dd><table class="docutils field-list" frame="void" rules="none">
-<col class="field-name" />
-<col class="field-body" />
-<tbody valign="top">
-<tr class="field-odd field"><th class="field-name">Returns:</th><td class="field-body">Base URL</td>
-</tr>
-<tr class="field-even field"><th class="field-name">Return type:</th><td class="field-body">string</td>
-</tr>
-</tbody>
-</table>
-<p>This method retrieves the URL to your site, plus an optional path such
-as to a stylesheet or image.</p>
-<p>This method is normally accessed via the corresponding functions in the
-<a class="reference internal" href="../helpers/url_helper.html"><span class="doc">URL Helper</span></a>.</p>
-</dd></dl>
-
-<dl class="method">
-<dt id="CI_Config::system_url">
-<code class="descname">system_url</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_Config::system_url" title="Permalink to this definition">¶</a></dt>
-<dd><table class="docutils field-list" frame="void" rules="none">
-<col class="field-name" />
-<col class="field-body" />
-<tbody valign="top">
-<tr class="field-odd field"><th class="field-name">Returns:</th><td class="field-body">URL pointing at your CI system/ directory</td>
-</tr>
-<tr class="field-even field"><th class="field-name">Return type:</th><td class="field-body">string</td>
-</tr>
-</tbody>
-</table>
-<p>This method retrieves the URL to your CodeIgniter system/ directory.</p>
-<div class="admonition note">
-<p class="first admonition-title">Note</p>
-<p class="last">This method is DEPRECATED because it encourages usage of
-insecure coding practices. Your <em>system/</em> directory shouldn’t
-be publicly accessible.</p>
-</div>
-</dd></dl>
-
-</dd></dl>
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