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| author | Derek Jones <derek.jones@ellislab.com> | 2011-10-05 20:34:52 +0200 |
|---|---|---|
| committer | Derek Jones <derek.jones@ellislab.com> | 2011-10-05 20:34:52 +0200 |
| commit | 8ede1a2ecbb62577afd32996956c5feaf7ddf9b6 (patch) | |
| tree | 2e960ec3b416b477f40bb546371f2d486f4a22f0 /user_guide/libraries/config.html | |
| parent | d1ecd5cd4ae6ab5d37df9fbda14b93977b9e743c (diff) | |
replacing the old HTML user guide with a Sphinx-managed user guide
Diffstat (limited to 'user_guide/libraries/config.html')
| -rw-r--r-- | user_guide/libraries/config.html | 222 |
1 files changed, 0 insertions, 222 deletions
diff --git a/user_guide/libraries/config.html b/user_guide/libraries/config.html deleted file mode 100644 index d522bbc5b..000000000 --- a/user_guide/libraries/config.html +++ /dev/null @@ -1,222 +0,0 @@ -<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> -<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> -<head> - -<meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> -<title>Config Class : CodeIgniter User Guide</title> - -<style type='text/css' media='all'>@import url('../userguide.css');</style> -<link rel='stylesheet' type='text/css' media='all' href='../userguide.css' /> - -<script type="text/javascript" src="../nav/nav.js"></script> -<script type="text/javascript" src="../nav/prototype.lite.js"></script> -<script type="text/javascript" src="../nav/moo.fx.js"></script> -<script type="text/javascript" src="../nav/user_guide_menu.js"></script> - -<meta http-equiv='expires' content='-1' /> -<meta http-equiv= 'pragma' content='no-cache' /> -<meta name='robots' content='all' /> -<meta name='author' content='ExpressionEngine Dev Team' /> -<meta name='description' content='CodeIgniter User Guide' /> - -</head> -<body> - -<!-- START NAVIGATION --> -<div id="nav"><div id="nav_inner"><script type="text/javascript">create_menu('../');</script></div></div> -<div id="nav2"><a name="top"></a><a href="javascript:void(0);" onclick="myHeight.toggle();"><img src="../images/nav_toggle_darker.jpg" width="154" height="43" border="0" title="Toggle Table of Contents" alt="Toggle Table of Contents" /></a></div> -<div id="masthead"> -<table cellpadding="0" cellspacing="0" border="0" style="width:100%"> -<tr> -<td><h1>CodeIgniter User Guide Version 2.0.3</h1></td> -<td id="breadcrumb_right"><a href="../toc.html">Table of Contents Page</a></td> -</tr> -</table> -</div> -<!-- END NAVIGATION --> - - -<!-- START BREADCRUMB --> -<table cellpadding="0" cellspacing="0" border="0" style="width:100%"> -<tr> -<td id="breadcrumb"> -<a href="http://codeigniter.com/">CodeIgniter Home</a> › -<a href="../index.html">User Guide Home</a> › -Config Class -</td> -<td id="searchbox"><form method="get" action="http://www.google.com/search"><input type="hidden" name="as_sitesearch" id="as_sitesearch" value="codeigniter.com/user_guide/" />Search User Guide <input type="text" class="input" style="width:200px;" name="q" id="q" size="31" maxlength="255" value="" /> <input type="submit" class="submit" name="sa" value="Go" /></form></td> -</tr> -</table> -<!-- END BREADCRUMB --> - -<br clear="all" /> - - -<!-- START CONTENT --> -<div id="content"> - - -<h1>Config Class</h1> - -<p>The Config class provides a means to retrieve configuration preferences. These preferences can -come from the default config file (<samp>application/config/config.php</samp>) or from your own custom config files.</p> - -<p class="important"><strong>Note:</strong> This class is initialized automatically by the system so there is no need to do it manually.</p> - - -<h2>Anatomy of a Config File</h2> - -<p>By default, CodeIgniter has one primary config file, located at <samp>application/config/config.php</samp>. If you open the file using -your text editor you'll see that config items are stored in an array called <var>$config</var>.</p> - -<p>You can add your own config items to -this file, or if you prefer to keep your configuration items separate (assuming you even need config items), -simply create your own file and save it in <dfn>config</dfn> folder.</p> - -<p><strong>Note:</strong> If you do create your own config files use the same format as the primary one, storing your items in -an array called <var>$config</var>. 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> - -<h2>Loading a Config File</h2> - -<p><strong>Note:</strong> CodeIgniter automatically loads the primary config file (<samp>application/config/config.php</samp>), -so you will only need to load a config file if you have created your own.</p> - -<p>There are two ways to load a config file:</p> - -<ol><li><strong>Manual Loading</strong> - -<p>To load one of your custom config files you will use the following function within the <a href="../general/controllers.html">controller</a> that needs it:</p> - -<code>$this->config->load('<var>filename</var>');</code> - -<p>Where <var>filename</var> 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 <kbd>TRUE</kbd> -and each config file will be stored in an array index corresponding to the name of the config file. Example:</p> - -<code> -// Stored in an array with this prototype: $this->config['blog_settings'] = $config<br /> -$this->config->load('<var>blog_settings</var>', <kbd>TRUE</kbd>);</code> - -<p>Please see the section entitled <dfn>Fetching Config Items</dfn> 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> - -<code>$this->config->load('<var>blog_settings</var>', <dfn>FALSE</dfn>, <kbd>TRUE</kbd>);</code> - -</li> -<li><strong>Auto-loading</strong> - -<p>If you find that you need a particular config file globally, you can have it loaded automatically by the system. To do this, -open the <strong>autoload.php</strong> file, located at <samp>application/config/autoload.php</samp>, and add your config file as -indicated in the file.</p> -</li> -</ol> - - -<h2>Fetching Config Items</h2> - -<p>To retrieve an item from your config file, use the following function:</p> - -<code>$this->config->item('<var>item name</var>');</code> - -<p>Where <var>item name</var> is the $config array index you want to retrieve. For example, to fetch your language choice you'll do this:</p> - -<code>$lang = $this->config->item('language');</code> - -<p>The function returns FALSE (boolean) if the item you are trying to fetch does not exist.</p> - -<p>If you are using the second parameter of the <kbd>$this->config->load</kbd> 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 <kbd>$this->config->item()</kbd> function. Example:</p> - -<code> -// Loads a config file named blog_settings.php and assigns it to an index named "blog_settings"<br /> -$this->config->load('<var>blog_settings</var>', <kbd>TRUE</kbd>);<br /><br /> - -// Retrieve a config item named site_name contained within the blog_settings array<br /> -$site_name = $this->config->item('<dfn>site_name</dfn>', '<var>blog_settings</var>');<br /><br /> - -// An alternate way to specify the same item:<br /> -$blog_config = $this->config->item('<var>blog_settings</var>');<br /> -$site_name = $blog_config['site_name'];</code> - -<h2>Setting a Config Item</h2> - -<p>If you would like to dynamically set a config item or change an existing one, you can do so using:</p> - -<code>$this->config->set_item('<var>item_name</var>', '<var>item_value</var>');</code> - -<p>Where <var>item_name</var> is the $config array index you want to change, and <var>item_value</var> is its value.</p> - -<a name="environments"></a> -<h2>Environments</h2> - -<p> - You may load different configuration files depending on the current environment. - The <kbd>ENVIRONMENT</kbd> constant is defined in index.php, and is described - in detail in the <a href="../general/environments.html">Handling Environments</a> - section. -</p> - -<p> - To create an environment-specific configuration file, - create or copy a configuration file in application/config/{ENVIRONMENT}/{FILENAME}.php -</p> - -<p>For example, to create a production-only config.php, you would:</p> - -<ol> - <li>Create the directory application/config/production/</li> - <li>Copy your existing config.php into the above directory</li> - <li>Edit application/config/production/config.php so it contains your production settings</li> -</ol> - -<p> - When you set the <kbd>ENVIRONMENT</kbd> constant to 'production', the settings - for your new production-only config.php will be loaded. -</p> - -<p>You can place the following configuration files in environment-specific folders:</p> - -<ul> -<li>Default CodeIgniter configuration files</li> -<li>Your own custom configuration files</li> -</ul> - -<p><strong>Note:</strong> CodeIgniter always tries to load the configuration files for the current environment first. If the file does not exist, the global config file (i.e., the one in <samp>application/config/</samp>) is loaded. This means you are not obligated to place <strong>all</strong> of your configuration files in an environment folder − only the files that change per environment.</p> - -<h2>Helper Functions</h2> - -<p>The config class has the following helper functions:</p> - -<h2>$this->config->site_url();</h2> -<p>This function retrieves the URL to your site, along with the "index" value you've specified in the config file.</p> - -<h2>$this->config->base_url();</h2> -<p>This function retrieves the URL to your site, plus an optional path such as to a stylesheet or image.</p> - -<p>The two functions above are normally accessed via the corresponding functions in the <a href="../helpers/url_helper.html">URL Helper.</a></p> - -<h2>$this->config->system_url();</h2> -<p>This function retrieves the URL to your <dfn>system folder</dfn>.</p> - - -</div> -<!-- END CONTENT --> - - -<div id="footer"> -<p> -Previous Topic: <a href="calendar.html">Calendaring Class</a> - · -<a href="#top">Top of Page</a> · -<a href="../index.html">User Guide Home</a> · -Next Topic: <a href="../database/index.html">Database Class</a> -</p> -<p><a href="http://codeigniter.com">CodeIgniter</a> · Copyright © 2006 - 2011 · <a href="http://ellislab.com/">EllisLab, Inc.</a></p> -</div> - -</body> -</html> |