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<h1 class="title">Introduction</h1>
<p class="para">
The Alternative PHP Cache (APC) is a free and open opcode cache for PHP.
Its goal is to provide a free, open, and robust framework for
caching and optimizing PHP intermediate code.
</p>
<div class="warning"><strong class="warning">Warning</strong>
<p class="simpara">
This extension is considered unmaintained and dead. However, the source code for
this extension is still available within <acronym title="PHP Extension and Application Repository">PECL</acronym>
<acronym>GIT</acronym> here: http://git.php.net/?p=pecl/caching/apc.git.
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<blockquote class="note"><p><strong class="note">Note</strong>:
<p class="para">
Alternatives to this extension are <a href="book.opcache.html" class="link">OPcache</a>, <a href="book.apcu.html" class="link">APCu</a>,
<a href="book.wincache.html" class="link">Windows Cache for PHP</a> and the <a href="session.upload-progress.html" class="link">Session Upload Progress API</a>.
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