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diff --git a/user_guide/libraries/config.html b/user_guide/libraries/config.html new file mode 100644 index 000000000..cd42e5875 --- /dev/null +++ b/user_guide/libraries/config.html @@ -0,0 +1,834 @@ + + +<!DOCTYPE html> +<!--[if IE 8]><html class="no-js lt-ie9" lang="en" > <![endif]--> +<!--[if gt IE 8]><!--> <html class="no-js" lang="en" > <!--<![endif]--> +<head> + <meta charset="utf-8"> + <meta name="viewport" content="width=device-width, initial-scale=1.0"> + + <title>Config Class — CodeIgniter 3.1.9 documentation</title> + + + + + <link rel="shortcut icon" href="../_static/ci-icon.ico"/> + + + + <link href='https://fonts.googleapis.com/css?family=Lato:400,700,400italic,700italic|Roboto+Slab:400,700|Inconsolata:400,700&subset=latin,cyrillic' rel='stylesheet' type='text/css'> + + + + + + + + + + <link rel="stylesheet" href="../_static/css/citheme.css" type="text/css" /> + + + + <link rel="index" title="Index" + href="../genindex.html"/> + <link rel="search" title="Search" 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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 class="current"> +<li class="toctree-l1 current"><a class="reference internal" href="index.html">Libraries</a><ul class="current"> +<li class="toctree-l2"><a class="reference internal" href="benchmark.html">Benchmarking Class</a></li> +<li class="toctree-l2"><a class="reference internal" href="caching.html">Caching Driver</a></li> +<li class="toctree-l2"><a class="reference internal" href="calendar.html">Calendaring Class</a></li> +<li class="toctree-l2"><a 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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" 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</ul> + <hr/> +</div> + <div role="main" class="document"> + + <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> + +</div> +</div> + + + </div> + <footer> + + <div class="rst-footer-buttons" role="navigation" aria-label="footer navigation"> + + <a href="email.html" class="btn btn-neutral float-right" title="Email Class">Next <span class="fa fa-arrow-circle-right"></span></a> + + + <a href="cart.html" class="btn btn-neutral" title="Shopping Cart Class"><span class="fa fa-arrow-circle-left"></span> Previous</a> + + </div> + + + <hr/> + + <div role="contentinfo"> + <p> + © Copyright 2014 - 2018, British Columbia Institute of Technology. + Last updated on Jun 12, 2018. + </p> + </div> + + Built with <a href="http://sphinx-doc.org/">Sphinx</a> using a <a href="https://github.com/snide/sphinx_rtd_theme">theme</a> provided by <a href="https://readthedocs.org">Read the Docs</a>. + +</footer> + </div> + </div> + + </section> + + </div> + + + + + + <script type="text/javascript"> + var DOCUMENTATION_OPTIONS = { + URL_ROOT:'../', + VERSION:'3.1.9', + COLLAPSE_INDEX:false, + FILE_SUFFIX:'.html', + HAS_SOURCE: false + }; + </script> + <script type="text/javascript" src="../_static/jquery.js"></script> + <script type="text/javascript" src="../_static/underscore.js"></script> + <script type="text/javascript" src="../_static/doctools.js"></script> + + + + + + <script type="text/javascript" src="../_static/js/theme.js"></script> + + + + + <script type="text/javascript"> + jQuery(function () { + SphinxRtdTheme.StickyNav.enable(); + }); + </script> + + +</body> +</html>
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