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authorEric Barnes <eric@ericlbarnes.com>2011-11-27 06:30:22 +0100
committerEric Barnes <eric@ericlbarnes.com>2011-11-27 06:30:22 +0100
commit7e66dda705743cbfe1d522ddb73e5694006ec42c (patch)
treec08b63deb28c09ec49d9173280f1ca234debfe50 /user_guide/general/caching.html
parent7eceb03f083643254c7393c6b5ebe539e344a1ba (diff)
parente101593561a10632c1d63180436b19f1d7115046 (diff)
Merge branch 'refs/heads/develop' into feature/unit-tests
Conflicts: user_guide/helpers/number_helper.html
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-<!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>
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-<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
-<title>Web Page Caching : 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>
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-<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>
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-<!-- 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 -->
-
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-<!-- 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;
-Page Caching
-</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" />
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-<!-- START CONTENT -->
-<div id="content">
-
-
-<h1>Web Page Caching</h1>
-
-<p>CodeIgniter lets you cache your pages in order to achieve maximum performance.</p>
-
-<p>Although CodeIgniter is quite fast, the amount of dynamic information you display in your pages will correlate directly to the
-server resources, memory, and processing cycles utilized, which affect your page load speeds.
-By caching your pages, since they are saved in their fully rendered state, you can achieve performance that nears that of static web pages.</p>
-
-
-<h2>How Does Caching Work?</h2>
-
-<p>Caching can be enabled on a per-page basis, and you can set the length of time that a page should remain cached before being refreshed.
-When a page is loaded for the first time, the cache file will be written to your <dfn>application/cache</dfn> folder. On subsequent page loads the cache file will be retrieved
-and sent to the requesting user's browser. If it has expired, it will be deleted and refreshed before being sent to the browser.</p>
-
-<p>Note: The Benchmark tag is not cached so you can still view your page load speed when caching is enabled.</p>
-
-<h2>Enabling Caching</h2>
-
-<p>To enable caching, put the following tag in any of your controller functions:</p>
-
-<code>$this->output->cache(<var>n</var>);</code>
-
-<p>Where <var>n</var> is the number of <strong>minutes</strong> you wish the page to remain cached between refreshes.</p>
-
-<p>The above tag can go anywhere within a function. It is not affected by the order that it appears, so place it wherever it seems
-most logical to you. Once the tag is in place, your pages will begin being cached.</p>
-
-<p class="important"><strong>Warning:</strong> Because of the way CodeIgniter stores content for output, caching will only work if you are generating display for your controller with a <a href="./views.html">view</a>.</p>
-<p class="important"><strong>Note:</strong> Before the cache files can be written you must set the file permissions on your
-<dfn>application/cache</dfn> folder such that it is writable.</p>
-
-<h2>Deleting Caches</h2>
-
-<p>If you no longer wish to cache a file you can remove the caching tag and it will no longer be refreshed when it expires. Note:
-Removing the tag will not delete the cache immediately. It will have to expire normally. If you need to remove it earlier you
-will need to manually delete it from your cache folder.</p>
-
-
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-</div>
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