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authorDerek Allard <derek.allard@ellislab.com>2008-11-13 23:59:24 +0100
committerDerek Allard <derek.allard@ellislab.com>2008-11-13 23:59:24 +0100
commit2067d1a727e7eb5e5ffb40e967f3d1fc4c8a41b2 (patch)
treea95e01024205837e9580757350d04b233e82503f /user_guide/general/creating_libraries.html
parentdd9f932556d3cd45a1d06cc478f40d06b7649a69 (diff)
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--- a/user_guide/general/creating_libraries.html
+++ b/user_guide/general/creating_libraries.html
@@ -1,298 +1,298 @@
-<!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>Creating Libraries : 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 1.7</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> &nbsp;&#8250;&nbsp;
-<a href="../index.html">User Guide Home</a> &nbsp;&#8250;&nbsp;
-Creating Libraries
-</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&nbsp; <input type="text" class="input" style="width:200px;" name="q" id="q" size="31" maxlength="255" value="" />&nbsp;<input type="submit" class="submit" name="sa" value="Go" /></form></td>
-</tr>
-</table>
-<!-- END BREADCRUMB -->
-
-<br clear="all" />
-
-
-<!-- START CONTENT -->
-<div id="content">
-
-<h1>Creating Libraries</h1>
-
-<p>When we use the term "Libraries" we are normally referring to the classes that are located in the <kbd>libraries</kbd>
-directory and described in the Class Reference of this user guide. In this case, however, we will instead describe how you can create
-your own libraries within your <dfn>application/libraries</dfn> directory in order to maintain separation between your local resources
-and the global framework resources.</p>
-
-<p>As an added bonus, CodeIgniter permits your libraries to <kbd>extend</kbd> native classes if you simply need to add some functionality
-to an existing library. Or you can even replace native libraries just by placing identically named versions in your <dfn>application/libraries</dfn> folder.</p>
-
-<p>In summary:</p>
-
-<ul>
-<li>You can create entirely new libraries.</li>
-<li>You can extend native libraries.</li>
-<li>You can replace native libraries.</li>
-</ul>
-
-<p>The page below explains these three concepts in detail.</p>
-
-<p class="important"><strong>Note:</strong> The Database classes can not be extended or replaced with your own classes,
-nor can the Loader class in PHP 4. All other classes are able to be replaced/extended.</p>
-
-
-<h2>Storage</h2>
-
-<p>Your library classes should be placed within your <dfn>application/libraries</dfn> folder, as this is where CodeIgniter will look for them when
-they are initialized.</p>
-
-
-<h2>Naming Conventions</h2>
-
-<ul>
-<li>File names must be capitalized. For example:&nbsp; <dfn>Myclass.php</dfn></li>
-<li>Class declarations must be capitalized. For example:&nbsp; <kbd>class Myclass</kbd></li>
-<li>Class names and file names must match.</li>
-</ul>
-
-
-<h2>The Class File</h2>
-
-<p>Classes should have this basic prototype (Note: We are using the name <kbd>Someclass</kbd> purely as an example):</p>
-
-<code>&lt;?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
-<br /><br />
-class Someclass {<br />
-<br />
-&nbsp;&nbsp;&nbsp;&nbsp;function some_function()<br />
-&nbsp;&nbsp;&nbsp;&nbsp;{<br />
-&nbsp;&nbsp;&nbsp;&nbsp;}<br />
-}<br /><br />
-?&gt;</code>
-
-
-<h2>Using Your Class</h2>
-
-<p>From within any of your <a href="controllers.html">Controller</a> functions you can initialize your class using the standard:</p>
-
-<code>$this->load->library('<kbd>someclass</kbd>');</code>
-
-<p>Where <em>someclass</em> is the file name, without the ".php" file extension. You can submit the file name capitalized or lower case.
-CodeIgniter doesn't care.</p>
-
-<p>Once loaded you can access your class using the <kbd>lower case</kbd> version:</p>
-
-<code>$this-><kbd>someclass</kbd>->some_function();&nbsp; // Object instances will always be lower case
-</code>
-
-
-
-<h2>Passing Parameters When Initializing Your Class</h2>
-
-<p>In the library loading function you can dynamically pass data via the second parameter and it will be passed to your class
-constructor:</p>
-
-<code>
-$params = array('type' => 'large', 'color' => 'red');<br />
-<br />
-$this->load->library('Someclass', <kbd>$params</kbd>);</code>
-
-<p>If you use this feature you must set up your class constructor to expect data:</p>
-
-<code>&lt;?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');<br />
-<br />
-class Someclass {<br />
-<br />
-&nbsp;&nbsp;&nbsp;&nbsp;function Someclass($params)<br />
-&nbsp;&nbsp;&nbsp;&nbsp;{<br />
-&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;// Do something with $params<br />
-&nbsp;&nbsp;&nbsp;&nbsp;}<br />
-}<br /><br />
-?&gt;</code>
-
-<p class="important">You can also pass parameters stored in a config file. Simply create a config file named identically to the class <kbd>file name</kbd>
-and store it in your <dfn>application/config/</dfn> folder. Note that if you dynamically pass parameters as described above,
-the config file option will not be available.</p>
-
-
-
-
-
-
-
-<h2>Utilizing CodeIgniter Resources within Your Library</h2>
-
-
-<p>To access CodeIgniter's native resources within your library use the <kbd>get_instance()</kbd> function.
-This function returns the CodeIgniter super object.</p>
-
-<p>Normally from within your controller functions you will call any of the available CodeIgniter functions using the <kbd>$this</kbd> construct:</p>
-
-<code>
-<strong>$this</strong>->load->helper('url');<br />
-<strong>$this</strong>->load->library('session');<br />
-<strong>$this</strong>->config->item('base_url');<br />
-etc.
-</code>
-
-<p><kbd>$this</kbd>, however, only works directly within your controllers, your models, or your views.
-If you would like to use CodeIgniter's classes from within your own custom classes you can do so as follows:</p>
-
-
-<p>First, assign the CodeIgniter object to a variable:</p>
-
-<code>$CI =&amp; get_instance();</code>
-
-<p>Once you've assigned the object to a variable, you'll use that variable <em>instead</em> of <kbd>$this</kbd>:</p>
-
-<code>
-$CI =&amp; get_instance();<br />
-<br />
-$CI->load->helper('url');<br />
-$CI->load->library('session');<br />
-$CI->config->item('base_url');<br />
-etc.
-</code>
-
-<p class="important"><strong>Note:</strong> You'll notice that the above get_instance() function is being passed by reference:
-<br /><br />
-<var>$CI =&amp; get_instance();</var>
-<br />
-<br />
-<kbd>This is very important.</kbd> Assigning by reference allows you to use the original CodeIgniter object rather than creating a copy of it.
-<br /><br />
-<kbd>Also, please note:</kbd> If you are running PHP 4 it's usually best to avoid calling <dfn>get_instance()</dfn>
-from within your class constructors. PHP 4 has trouble referencing the CI super object within application constructors
-since objects do not exist until the class is fully instantiated.</p>
-
-
-<h2>Replacing Native Libraries with Your Versions</h2>
-
-<p>Simply by naming your class files identically to a native library will cause CodeIgniter to use it instead of the native one. To use this
-feature you must name the file and the class declaration exactly the same as the native library. For example, to replace the native <kbd>Email</kbd> library
-you'll create a file named <dfn>application/libraries/Email.php</dfn>, and declare your class with:</p>
-
-<code>
-class CI_Email {<br /><br />
-
-}</code>
-
-<p>Note that most native classes are prefixed with <kbd>CI_</kbd>.</p>
-
-<p>To load your library you'll see the standard loading function:</p>
-
-<code>$this->load->library('<kbd>email</kbd>');</code>
-
-<p class="important"><strong>Note:</strong> At this time the Database classes can not be replaced with your own versions.</p>
-
-
-<h2>Extending Native Libraries</h2>
-
-<p>If all you need to do is add some functionality to an existing library - perhaps add a function or two - then
-it's overkill to replace the entire library with your version. In this case it's better to simply extend the class.
-Extending a class is nearly identical to replacing a class with a couple exceptions:</p>
-
-<ul>
-<li>The class declaration must extend the parent class.</li>
-<li>Your new class name and filename must be prefixed with <kbd>MY_</kbd> (this item is configurable. See below.).</li>
-</ul>
-
-<p>For example, to extend the native <kbd>Email</kbd> class you'll create a file named <dfn>application/libraries/</dfn><kbd>MY_Email.php</kbd>, and declare your class with:</p>
-
-<code>
-class MY_Email extends CI_Email {<br /><br />
-
-}</code>
-
-<p>Note: If you need to use a constructor in your class make sure you extend the parent constructor:</p>
-
-
-<code>
-class MY_Email extends CI_Email {<br />
-<br />
-&nbsp;&nbsp;&nbsp;&nbsp;function My_Email()<br />
-&nbsp;&nbsp;&nbsp;&nbsp;{<br />
-&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;parent::CI_Email();<br />
-&nbsp;&nbsp;&nbsp;&nbsp;}<br />
-}</code>
-
-
-<h3>Loading Your Sub-class</h3>
-
-<p>To load your sub-class you'll use the standard syntax normally used. DO NOT include your prefix. For example,
-to load the example above, which extends the Email class, you will use:</p>
-
-<code>$this->load->library('<kbd>email</kbd>');</code>
-
-<p>Once loaded you will use the class variable as you normally would for the class you are extending. In the case of
-the email class all calls will use:</p>
-
-
-<code>$this-><kbd>email</kbd>->some_function();</code>
-
-
-<h3>Setting Your Own Prefix</h3>
-
-<p>To set your own sub-class prefix, open your <dfn>application/config/config.php</dfn> file and look for this item:</p>
-
-<code>$config['subclass_prefix'] = 'MY_';</code>
-
-<p>Please note that all native CodeIgniter libraries are prefixed with <kbd>CI_</kbd> so DO NOT use that as your prefix.</p>
-
-
-
-</div>
-<!-- END CONTENT -->
-
-
-<div id="footer">
-<p>
-Previous Topic:&nbsp;&nbsp;<a href="libraries.html">Using CodeIgniter Libraries</a>
-&nbsp;&nbsp;&nbsp;&middot;&nbsp;&nbsp;
-<a href="#top">Top of Page</a>&nbsp;&nbsp;&nbsp;&middot;&nbsp;&nbsp;
-<a href="../index.html">User Guide Home</a>&nbsp;&nbsp;&nbsp;&middot;&nbsp;&nbsp;
-Next Topic:&nbsp;&nbsp;<a href="core_classes.html">Creating Core System Classes</a>
-</p>
-<p><a href="http://codeigniter.com">CodeIgniter</a> &nbsp;&middot;&nbsp; Copyright &#169; 2006-2008 &nbsp;&middot;&nbsp; <a href="http://ellislab.com/">Ellislab, Inc.</a></p>
-</div>
-
-</body>
+<!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>Creating Libraries : 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 1.7</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> &nbsp;&#8250;&nbsp;
+<a href="../index.html">User Guide Home</a> &nbsp;&#8250;&nbsp;
+Creating Libraries
+</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&nbsp; <input type="text" class="input" style="width:200px;" name="q" id="q" size="31" maxlength="255" value="" />&nbsp;<input type="submit" class="submit" name="sa" value="Go" /></form></td>
+</tr>
+</table>
+<!-- END BREADCRUMB -->
+
+<br clear="all" />
+
+
+<!-- START CONTENT -->
+<div id="content">
+
+<h1>Creating Libraries</h1>
+
+<p>When we use the term "Libraries" we are normally referring to the classes that are located in the <kbd>libraries</kbd>
+directory and described in the Class Reference of this user guide. In this case, however, we will instead describe how you can create
+your own libraries within your <dfn>application/libraries</dfn> directory in order to maintain separation between your local resources
+and the global framework resources.</p>
+
+<p>As an added bonus, CodeIgniter permits your libraries to <kbd>extend</kbd> native classes if you simply need to add some functionality
+to an existing library. Or you can even replace native libraries just by placing identically named versions in your <dfn>application/libraries</dfn> folder.</p>
+
+<p>In summary:</p>
+
+<ul>
+<li>You can create entirely new libraries.</li>
+<li>You can extend native libraries.</li>
+<li>You can replace native libraries.</li>
+</ul>
+
+<p>The page below explains these three concepts in detail.</p>
+
+<p class="important"><strong>Note:</strong> The Database classes can not be extended or replaced with your own classes,
+nor can the Loader class in PHP 4. All other classes are able to be replaced/extended.</p>
+
+
+<h2>Storage</h2>
+
+<p>Your library classes should be placed within your <dfn>application/libraries</dfn> folder, as this is where CodeIgniter will look for them when
+they are initialized.</p>
+
+
+<h2>Naming Conventions</h2>
+
+<ul>
+<li>File names must be capitalized. For example:&nbsp; <dfn>Myclass.php</dfn></li>
+<li>Class declarations must be capitalized. For example:&nbsp; <kbd>class Myclass</kbd></li>
+<li>Class names and file names must match.</li>
+</ul>
+
+
+<h2>The Class File</h2>
+
+<p>Classes should have this basic prototype (Note: We are using the name <kbd>Someclass</kbd> purely as an example):</p>
+
+<code>&lt;?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+<br /><br />
+class Someclass {<br />
+<br />
+&nbsp;&nbsp;&nbsp;&nbsp;function some_function()<br />
+&nbsp;&nbsp;&nbsp;&nbsp;{<br />
+&nbsp;&nbsp;&nbsp;&nbsp;}<br />
+}<br /><br />
+?&gt;</code>
+
+
+<h2>Using Your Class</h2>
+
+<p>From within any of your <a href="controllers.html">Controller</a> functions you can initialize your class using the standard:</p>
+
+<code>$this->load->library('<kbd>someclass</kbd>');</code>
+
+<p>Where <em>someclass</em> is the file name, without the ".php" file extension. You can submit the file name capitalized or lower case.
+CodeIgniter doesn't care.</p>
+
+<p>Once loaded you can access your class using the <kbd>lower case</kbd> version:</p>
+
+<code>$this-><kbd>someclass</kbd>->some_function();&nbsp; // Object instances will always be lower case
+</code>
+
+
+
+<h2>Passing Parameters When Initializing Your Class</h2>
+
+<p>In the library loading function you can dynamically pass data via the second parameter and it will be passed to your class
+constructor:</p>
+
+<code>
+$params = array('type' => 'large', 'color' => 'red');<br />
+<br />
+$this->load->library('Someclass', <kbd>$params</kbd>);</code>
+
+<p>If you use this feature you must set up your class constructor to expect data:</p>
+
+<code>&lt;?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');<br />
+<br />
+class Someclass {<br />
+<br />
+&nbsp;&nbsp;&nbsp;&nbsp;function Someclass($params)<br />
+&nbsp;&nbsp;&nbsp;&nbsp;{<br />
+&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;// Do something with $params<br />
+&nbsp;&nbsp;&nbsp;&nbsp;}<br />
+}<br /><br />
+?&gt;</code>
+
+<p class="important">You can also pass parameters stored in a config file. Simply create a config file named identically to the class <kbd>file name</kbd>
+and store it in your <dfn>application/config/</dfn> folder. Note that if you dynamically pass parameters as described above,
+the config file option will not be available.</p>
+
+
+
+
+
+
+
+<h2>Utilizing CodeIgniter Resources within Your Library</h2>
+
+
+<p>To access CodeIgniter's native resources within your library use the <kbd>get_instance()</kbd> function.
+This function returns the CodeIgniter super object.</p>
+
+<p>Normally from within your controller functions you will call any of the available CodeIgniter functions using the <kbd>$this</kbd> construct:</p>
+
+<code>
+<strong>$this</strong>->load->helper('url');<br />
+<strong>$this</strong>->load->library('session');<br />
+<strong>$this</strong>->config->item('base_url');<br />
+etc.
+</code>
+
+<p><kbd>$this</kbd>, however, only works directly within your controllers, your models, or your views.
+If you would like to use CodeIgniter's classes from within your own custom classes you can do so as follows:</p>
+
+
+<p>First, assign the CodeIgniter object to a variable:</p>
+
+<code>$CI =&amp; get_instance();</code>
+
+<p>Once you've assigned the object to a variable, you'll use that variable <em>instead</em> of <kbd>$this</kbd>:</p>
+
+<code>
+$CI =&amp; get_instance();<br />
+<br />
+$CI->load->helper('url');<br />
+$CI->load->library('session');<br />
+$CI->config->item('base_url');<br />
+etc.
+</code>
+
+<p class="important"><strong>Note:</strong> You'll notice that the above get_instance() function is being passed by reference:
+<br /><br />
+<var>$CI =&amp; get_instance();</var>
+<br />
+<br />
+<kbd>This is very important.</kbd> Assigning by reference allows you to use the original CodeIgniter object rather than creating a copy of it.
+<br /><br />
+<kbd>Also, please note:</kbd> If you are running PHP 4 it's usually best to avoid calling <dfn>get_instance()</dfn>
+from within your class constructors. PHP 4 has trouble referencing the CI super object within application constructors
+since objects do not exist until the class is fully instantiated.</p>
+
+
+<h2>Replacing Native Libraries with Your Versions</h2>
+
+<p>Simply by naming your class files identically to a native library will cause CodeIgniter to use it instead of the native one. To use this
+feature you must name the file and the class declaration exactly the same as the native library. For example, to replace the native <kbd>Email</kbd> library
+you'll create a file named <dfn>application/libraries/Email.php</dfn>, and declare your class with:</p>
+
+<code>
+class CI_Email {<br /><br />
+
+}</code>
+
+<p>Note that most native classes are prefixed with <kbd>CI_</kbd>.</p>
+
+<p>To load your library you'll see the standard loading function:</p>
+
+<code>$this->load->library('<kbd>email</kbd>');</code>
+
+<p class="important"><strong>Note:</strong> At this time the Database classes can not be replaced with your own versions.</p>
+
+
+<h2>Extending Native Libraries</h2>
+
+<p>If all you need to do is add some functionality to an existing library - perhaps add a function or two - then
+it's overkill to replace the entire library with your version. In this case it's better to simply extend the class.
+Extending a class is nearly identical to replacing a class with a couple exceptions:</p>
+
+<ul>
+<li>The class declaration must extend the parent class.</li>
+<li>Your new class name and filename must be prefixed with <kbd>MY_</kbd> (this item is configurable. See below.).</li>
+</ul>
+
+<p>For example, to extend the native <kbd>Email</kbd> class you'll create a file named <dfn>application/libraries/</dfn><kbd>MY_Email.php</kbd>, and declare your class with:</p>
+
+<code>
+class MY_Email extends CI_Email {<br /><br />
+
+}</code>
+
+<p>Note: If you need to use a constructor in your class make sure you extend the parent constructor:</p>
+
+
+<code>
+class MY_Email extends CI_Email {<br />
+<br />
+&nbsp;&nbsp;&nbsp;&nbsp;function My_Email()<br />
+&nbsp;&nbsp;&nbsp;&nbsp;{<br />
+&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;parent::CI_Email();<br />
+&nbsp;&nbsp;&nbsp;&nbsp;}<br />
+}</code>
+
+
+<h3>Loading Your Sub-class</h3>
+
+<p>To load your sub-class you'll use the standard syntax normally used. DO NOT include your prefix. For example,
+to load the example above, which extends the Email class, you will use:</p>
+
+<code>$this->load->library('<kbd>email</kbd>');</code>
+
+<p>Once loaded you will use the class variable as you normally would for the class you are extending. In the case of
+the email class all calls will use:</p>
+
+
+<code>$this-><kbd>email</kbd>->some_function();</code>
+
+
+<h3>Setting Your Own Prefix</h3>
+
+<p>To set your own sub-class prefix, open your <dfn>application/config/config.php</dfn> file and look for this item:</p>
+
+<code>$config['subclass_prefix'] = 'MY_';</code>
+
+<p>Please note that all native CodeIgniter libraries are prefixed with <kbd>CI_</kbd> so DO NOT use that as your prefix.</p>
+
+
+
+</div>
+<!-- END CONTENT -->
+
+
+<div id="footer">
+<p>
+Previous Topic:&nbsp;&nbsp;<a href="libraries.html">Using CodeIgniter Libraries</a>
+&nbsp;&nbsp;&nbsp;&middot;&nbsp;&nbsp;
+<a href="#top">Top of Page</a>&nbsp;&nbsp;&nbsp;&middot;&nbsp;&nbsp;
+<a href="../index.html">User Guide Home</a>&nbsp;&nbsp;&nbsp;&middot;&nbsp;&nbsp;
+Next Topic:&nbsp;&nbsp;<a href="core_classes.html">Creating Core System Classes</a>
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