diff options
Diffstat (limited to 'user_guide/general/caching.html')
| -rw-r--r-- | user_guide/general/caching.html | 228 |
1 files changed, 114 insertions, 114 deletions
diff --git a/user_guide/general/caching.html b/user_guide/general/caching.html index 0a6d9d655..df4335238 100644 --- a/user_guide/general/caching.html +++ b/user_guide/general/caching.html @@ -1,115 +1,115 @@ -<!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>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>
-<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> ›
-<a href="../index.html">User Guide Home</a> ›
-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 <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>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>system/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>system/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>
-
-
-
-</div>
-<!-- END CONTENT -->
-
-
-<div id="footer">
-<p>
-Previous Topic: <a href="errors.html">Error Handling</a>
- ·
-<a href="#top">Top of Page</a> ·
-<a href="../index.html">User Guide Home</a> ·
-Next Topic: <a href="profiling.html">Profiling Your Application</a>
-</p>
-<p><a href="http://codeigniter.com">CodeIgniter</a> · Copyright © 2006-2008 · <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>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> +<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> › +<a href="../index.html">User Guide Home</a> › +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 <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>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>system/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>system/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> + + + +</div> +<!-- END CONTENT --> + + +<div id="footer"> +<p> +Previous Topic: <a href="errors.html">Error Handling</a> + · +<a href="#top">Top of Page</a> · +<a href="../index.html">User Guide Home</a> · +Next Topic: <a href="profiling.html">Profiling Your Application</a> +</p> +<p><a href="http://codeigniter.com">CodeIgniter</a> · Copyright © 2006-2008 · <a href="http://ellislab.com/">Ellislab, Inc.</a></p> +</div> + +</body> </html>
\ No newline at end of file |