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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">-></span><span class="na">config</span><span class="o">-></span><span class="na">load</span><span class="p">(</span><span class="s1">'filename'</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->config['blog_settings'] = $config</span> |
| <span class="nv">$this</span><span class="o">-></span><span class="na">config</span><span class="o">-></span><span class="na">load</span><span class="p">(</span><span class="s1">'blog_settings'</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">$this</span><span class="o">-></span><span class="na">config</span><span class="o">-></span><span class="na">load</span><span class="p">(</span><span class="s1">'blog_settings'</span><span class="p">,</span> <span class="k">FALSE</span><span class="p">,</span> <span class="k">TRUE</span><span class="p">);</span> |
| </pre></div> |
| </div> |
| </div> |
| <div class="section" id="auto-loading"> |
| <h4><a class="toc-backref" href="#id5">Auto-loading</a><a class="headerlink" href="#auto-loading" title="Permalink to this headline">¶</a></h4> |
| <p>If you find that you need a particular config file globally, you can |
| have it loaded automatically by the system. To do this, open the |
| <strong>autoload.php</strong> file, located at application/config/autoload.php, |
| and add your config file as indicated in the file.</p> |
| </div> |
| </div> |
| <div class="section" id="fetching-config-items"> |
| <h3><a class="toc-backref" href="#id6">Fetching Config Items</a><a class="headerlink" href="#fetching-config-items" title="Permalink to this headline">¶</a></h3> |
| <p>To retrieve an item from your config file, use the following function:</p> |
| <div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">config</span><span class="o">-></span><span class="na">item</span><span class="p">(</span><span class="s1">'item_name'</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">-></span><span class="na">config</span><span class="o">-></span><span class="na">item</span><span class="p">(</span><span class="s1">'language'</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->config->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 $this->config->item() function. Example:</p> |
| <div class="highlight-ci"><div class="highlight"><pre><span></span><span class="c1">// Loads a config file named blog_settings.php and assigns it to an index named "blog_settings"</span> |
| <span class="nv">$this</span><span class="o">-></span><span class="na">config</span><span class="o">-></span><span class="na">load</span><span class="p">(</span><span class="s1">'blog_settings'</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">-></span><span class="na">config</span><span class="o">-></span><span class="na">item</span><span class="p">(</span><span class="s1">'site_name'</span><span class="p">,</span> <span class="s1">'blog_settings'</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">-></span><span class="na">config</span><span class="o">-></span><span class="na">item</span><span class="p">(</span><span class="s1">'blog_settings'</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">'site_name'</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">-></span><span class="na">config</span><span class="o">-></span><span class="na">set_item</span><span class="p">(</span><span class="s1">'item_name'</span><span class="p">,</span> <span class="s1">'item_value'</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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| Last updated on Jan 16, 2019. |
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