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+---
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+---
+
+## Object Caching
+
+There are times when it can be beneficial to cache individual objects in your code, such as with data that is expensive
+to get or database calls where the result is unlikely to change. You can use object caching software to hold these
+pieces of data in memory for extremely fast access later on. If you save these items to a data store after you retrieve
+them, then pull them directly from the cache for following requests you can gain a significant improvement in
+performance as well as reduce the load on your database servers.
+
+Many of the popular bytecode caching solutions let you cache custom data as well, so there's even more reason to take
+advantage of them. APC, XCache, and WinCache all provide APIs to save data from your PHP code to their memory cache.
+
+The most commonly used memory object caching systems are APC and memcached. APC is an excellent choice for object
+caching, it includes a simple API for adding your own data to its memory cache and is very easy to setup and use. The
+one real limitation of APC is that it is tied to the server it's installed on. Memcached on the other hand is installed
+as a separate service and can be accessed across the network, meaning that you can store objects in a hyper-fast data
+store in a central location and many different systems can pull from it.
+
+In a networked configuration APC will usually outperform memcached in terms of access speed, but memcached will be able
+to scale up faster and further. If you do not expect to have multiple servers running your application, or do not need
+the extra features that memcached offers then APC is probably your best choice for object caching.
+
+Example logic using APC:
+
+{% highlight php %}
+<?php
+$data = apc_fetch('expensive_data');
+if (!$data)
+{
+	$data = get_expensive_data();
+	apc_store('expensive_data', $data);
+}
+{% endhighlight %}
+
+Learn more about popular object caching systems:
+
+* [APC Functions](http://php.net/manual/en/ref.apc.php)
+* [Memcached](http://memcached.org/)
+* [Redis](http://redis.io/)
+* [XCache APIs](http://xcache.lighttpd.net/wiki/XcacheApi)
+* [WinCache Functions](http://www.php.net/manual/en/ref.wincache.php)