diff options
| author | Joël Cox <joel@joelcox.nl> | 2011-10-09 18:39:39 +0200 |
|---|---|---|
| committer | Joël Cox <joel@joelcox.nl> | 2011-10-09 18:39:39 +0200 |
| commit | f4fb1db458fab52d0493ead52c9ea7e01206eaa7 (patch) | |
| tree | c549600f342f4d3f0df75a2f2f7c265be0f1cc72 /user_guide/libraries/caching.html | |
| parent | c4dd200c1155a118afa32cd91d9bd67bc243f83a (diff) | |
Moved tutorial to new user guide directory.
Diffstat (limited to 'user_guide/libraries/caching.html')
| -rw-r--r-- | user_guide/libraries/caching.html | 193 |
1 files changed, 0 insertions, 193 deletions
diff --git a/user_guide/libraries/caching.html b/user_guide/libraries/caching.html deleted file mode 100644 index 9b503f6d1..000000000 --- a/user_guide/libraries/caching.html +++ /dev/null @@ -1,193 +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>Caching Driver : 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> › -<a href="../general/drivers.html">Drivers</a> › -Caching Driver -</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>Caching Driver</h1> - -<p>CodeIgniter features wrappers around some of the most popular forms of fast and dynamic caching. All but file-based caching require specific server requirements, and a Fatal Exception will be thrown if server requirements are not met.</p> - -<h2>Table of Contents</h2> -<ul> - <li><a href="#example_usage" title="Example Usage">Example Usage</a></li> - <li><a href="#function_reference" title="Function Reference">Function Reference</a></li> -</ul> - -<h3>Available Drivers</h3> -<ul> - <li><a href="#apc" title="APC Cache">Alternative PHP Cache (APC) Caching</a></li> - <li><a href="#file" title="File Caching">File-based Caching</a></li> - <li><a href="#memcached" title="Memcached">Memcached Caching</a></li> - <li><a href="#dummy" title="Dummy Caching">Dummy Cache</a></li> -</ul> - -<h2 id="example_usage">Example Usage</h2> - -<p>The following example will load the cache driver, specify <a href="#apc" title="APC">APC</a> as the driver to use, and fall back to file-based caching if APC is not available in the hosting environment.</p> - -<code> -$this->load->driver('cache', array('adapter' => 'apc', 'backup' => 'file'));<br /> -<br /> -if ( ! $foo = $this->cache->get('foo'))<br /> -{<br /> - echo 'Saving to the cache!<br />';<br /> - $foo = 'foobarbaz!';<br /> -<br /> - // Save into the cache for 5 minutes<br /> - $this->cache->save('foo', $foo, 300);<br /> -}<br /> -<br /> -echo $foo; -</code> - -<h1 id="function_reference">Function Reference</h1> - -<h2>is_supported(<var>driver</var>['string'])</h2> - -<p>This function is automatically called when accessing drivers via <samp>$this->cache->get()</samp>. However, if the individual drivers are used, make sure to call this function to ensure the driver is supported in the hosting environment.</p> - -<code> -if ($this->cache->apc->is_supported())<br /> -{<br /> - if ($data = $this->cache->apc->get('my_cache'))<br /> - {<br /> - // do things.<br /> - }<br /> -} -</code> - -<h2>get(<var>id</var>['string'])</h2> - -<p>This function will attempt to fetch an item from the cache store. If the item does not exist, the function will return <samp>FALSE</samp>.</p> -<code>$foo = $this->cache->get('my_cached_item');</code> - -<h2>save(<var>id</var>['string'], <var>data</var>['mixed'], <var>ttl</var>['int'])</h2> - -<p>This function will save an item to the cache store. If saving fails, the function will return <samp>FALSE</samp>.</p> -<p>The optional third parameter (Time To Live) defaults to 60 seconds.</p> -<code>$this->cache->save('cache_item_id', 'data_to_cache');</code> - -<h2>delete(<var>id</var>['string'])</h2> - -<p>This function will delete a specific item from the cache store. If item deletion fails, the function will return <samp>FALSE</samp>.</p> -<code>$this->cache->delete('cache_item_id');</code> - -<h2>clean()</h2> - -<p>This function will 'clean' the entire cache. If the deletion of the cache files fails, the function will return <samp>FALSE</samp>.</p> - -<code>$this->cache->clean();</code> - -<h2>cache_info()</h2> - -<p>This function will return information on the entire cache.</p> - -<code>var_dump($this->cache->cache_info());</code> - -<h2>get_metadata(<var>id</var>['string'])</h2> - -<p>This function will return detailed information on a specific item in the cache.</p> - -<code>var_dump($this->cache->get_metadata('my_cached_item'));</code> - -<h1>Drivers</h1> - -<h2 id="apc">Alternative PHP Cache (APC) Caching</h2> - -<p>All of the functions listed above can be accessed without passing a specific adapter to the driver loader as follows:</p> -<code>$this->load->driver('cache');<br /> - $this->cache->apc->save('foo', 'bar', 10);</code> -<p>For more information on APC, please see <a href="http://php.net/apc">http://php.net/apc</a></p> - -<h2 id="file">File-based Caching</h2> - -<p>Unlike caching from the Output Class, the driver file-based caching allows for pieces of view files to be cached. Use this with care, and make sure to benchmark your application, as a point can come where disk I/O will negate positive gains by caching.</p> - -<p>All of the functions listed above can be accessed without passing a specific adapter to the driver loader as follows:</p> -<code>$this->load->driver('cache');<br /> - $this->cache->file->save('foo', 'bar', 10);</code> - -<h2 id="memcached">Memcached Caching</h2> - -<p>Multiple Memcached servers can be specified in the memcached.php configuration file, located in the <samp>application/config/</samp> directory. - -<p>All of the functions listed above can be accessed without passing a specific adapter to the driver loader as follows:</p> -<code>$this->load->driver('cache');<br /> - $this->cache->memcached->save('foo', 'bar', 10);</code> - -<p>For more information on Memcached, please see <a href="http://php.net/memcached">http://php.net/memcached</a></p> - -<h2 id="dummy">Dummy Cache</h2> - -<p>This is a caching backend that will always 'miss.' It stores no data, but lets you keep your caching code in place in environments that don't support your chosen cache.</p> - -</div> -<!-- END CONTENT --> - - -<div id="footer"> -<p> -Previous Topic: <a href="zip.html">Zip Encoding 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>
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