> For the complete documentation index, see [llms.txt](https://xoops.gitbook.io/xoops-installation-guide/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://xoops.gitbook.io/xoops-installation-guide/chapter-3-server-configuration-check.md).

# Chapter 3: Server Configuration Check

The Installation Wizard now checks your server configuration and splits the results into two blocks: **Requirements** (hard failures) and **Recommended extensions** (soft warnings).

![](/files/-LD6MzycFzRdZFtNakpD)

Figure 4: Server configuration check

## Requirements

These entries must all succeed. If any of them fail, fix the environment before continuing; XOOPS 2.7.0 will not run otherwise.

| Check              | Why it matters                                             |
| ------------------ | ---------------------------------------------------------- |
| Server API         | Shows your web server software and PHP SAPI mode.          |
| PHP version        | Must be **PHP 8.2.0 or later**.                            |
| MySQLi extension   | Required database driver.                                  |
| Session extension  | Required for login and wizard state.                       |
| PCRE extension     | Required for regular expressions used throughout the core. |
| filter extension   | Required for input sanitization (`filter_var`, etc.).      |
| `file_uploads`     | Must be enabled in `php.ini`.                              |
| fileinfo extension | Required for MIME-type detection.                          |

## Recommended extensions

These are not strictly required, but they enable important functionality. Install them whenever possible.

| Extension | Used for             |
| --------- | -------------------- |
| mbstring  | Character encoding   |
| intl      | Internationalization |
| iconv     | Character conversion |
| xml       | XML parsing          |
| zlib      | Compression          |
| gd        | Image functions      |
| exif      | Image metadata       |
| curl      | HTTP client          |

If every required entry is green, click **\[Next]** to continue.