> ## Documentation Index
> Fetch the complete documentation index at: https://kb.hosting.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Determining if APC is installed on a server

> Learn how to determine if the Alternative PHP Cache (APC) is installed on your server. Give your site a boost with APC Hosting!

This article describes how to determine if the Alternative PHP Cache (APC) is currently installed on your server.

<Note>
  APC is supported on the following hosting packages:

  * Turbo Velocity and Turbo Nitro Web Hosting

  * VPS (managed and unmanaged)

  * Dedicated server (managed and unmanaged)
</Note>

## About APC

The Alternative PHP Cache (APC) is a PHP extension that provides *opcode caching*. By caching the compiled operation codes (opcodes) of PHP scripts, APC enables sites to serve page content significantly faster. APC runs on PHP 5.4 and earlier versions.

Because APC is a separate extension, it may or may not already be installed on your server. The following procedure explains how to determine if your server has the APC extension installed.

<Note>
  For PHP 5.5 and later versions, **OPcache** replaces APC. OPcache is a core PHP component that does not require the installation of a separate extension.
</Note>

## Determining if APC is installed

To determine if the APC extension is installed on your server, follow these steps:

1. Create a file that contains the following PHP code:

```
<?php
    phpinfo();
?>
```

2. Save the file as *info.php*.

3. Upload the file to the *public\_html* directory on your hosting account.

4. Use your browser to go to *[http://example.com/info.php](http://example.com/info.php)*, where ***example.com*** represents your website's domain name. The page displays a large amount of information about the server's PHP installation.

5. Use your browser to search for the term **apc**. If APC is installed, you see a section that resembles the following:\
   ![PHP - APC](https://static.hosting.com/kb/kb-php-config-apc.png)

<Warning>
  **️ Warning**

  For security reasons, you should remove the *info.php* file after you are done testing.
</Warning>

## More information

For more information about OPcache, please visit [https://php.net/manual/en/book.opcache.php](https://php.net/manual/en/book.opcache.php).

## Related articles

* [Viewing PHP settings](/docs/view-php-settings)