---
title: "Install Éclair on Infomaniak"
description: "Install Éclair on Infomaniak: PHP set per site, Let's Encrypt, the welcome page to delete and the /sites folder. Prices checked on November 1, 2026."
url: "https://eclair.academy/en/hosting/infomaniak"
lang: "en"
author: "Thierry Gustin"
published: "2026-11-02"
updated: "2026-11-02"
---

# Install Éclair on Infomaniak

> **Key takeaways** — To install Éclair on Infomaniak, choose PHP 8.3 or later in the site's Advanced menu, install the Let's Encrypt certificate and delete the welcome page, because index.html comes before index.php. Then upload and extract the archive in /sites/your-domain with the Web FTP. Be careful: a PHP upgrade can't be undone.

When you install Éclair on Infomaniak, you choose Swiss hosting with no promotional price to watch, and a Web FTP that extracts archives. Three quirks change the procedure: the site folder is called `/sites/your-domain`, a welcome page can hide Éclair, and a PHP upgrade is permanent. This guide covers them in order, in about 25 minutes.

> **Before you start** — Time: 25 minutes. Plan: Hébergement Web, Infomaniak's web hosting plan. The free Hébergement Starter isn't suitable: it only accepts static pages (HTML and CSS, 10 MB). Have at hand: your Manager login (`manager.infomaniak.com`), a domain whose DNS points to the site and the [eclair-cms-1.8.0.zip](https://github.com/Jacckisback/eclair-cms/raw/main/dist/eclair-cms-1.8.0.zip) archive. The Manager labels quoted here are those of Infomaniak's English help. The requirements are in [Prepare your installation](https://eclair.academy/en/paths/beginner/prepare-installation).

## The plan and control panel at a glance

| Item | At Infomaniak |
| --- | --- |
| Control panel | Infomaniak's Manager, **hosting & website management** section |
| Web server | Apache; `.htaccess` supported |
| PHP version | Set site by site; up to PHP 8.5, highlighted on the pricing page |
| Public folder | `/sites/your-domain` by default |
| ZIP extraction | Yes, the Web FTP unzips archives (uploads under 50 MB) |
| Outgoing connections | A list of ports open by default, plus self-service port opening |
| Price checked on November 1, 2026 | Hébergement Web: from CHF 10.91 excl. VAT/month, billed annually by default ([Infomaniak pricing](https://www.infomaniak.com/fr/hebergement/tarifs-et-caracteristiques), in French) |

This price was read on Infomaniak's French-language pricing page, which showed Swiss francs, excluding VAT. The page shows no promotion and no separate renewal price, and offers a 30-day free trial. The euro price couldn't be checked: it may depend on the country you view the page from. The plan includes 20 sites.

## Step 1: choose PHP 8.3

1. In the Manager, open **hosting & website management**, then click your site's name.
2. In the left-hand menu, click **Advanced**, then **Edit**.
3. Choose 8.3 or a later version, then click **Save**. The change is immediate.

> **No going back** — At Infomaniak, moving off a vulnerable PHP version is irreversible. If your site already runs 8.4 or 8.5, keep that version: Éclair needs PHP 8.1 or later. If the version you want doesn't appear, update your hosting first.

Other settings (`memory_limit`, extensions) are under **Manage advanced settings**, in the **PHP / Apache** and **PHP Extensions** tabs.

## Step 2: turn on the HTTPS certificate

1. In **hosting & website management**, open the action menu **⋮** to the right of your site.
2. Click **Install a certificate**.
3. Choose the free Let's Encrypt certificate, click **Next**, tick your domain, then click **Install**. The domain's DNS must already point to the site.

The redirect to HTTPS is normally automatic with a standard setup. Otherwise, Éclair takes care of it: when you run its wizard over `https://`, it checks **Force HTTPS**, then redirects every visit to the official address once that address is verified. Infomaniak also offers an `.htaccess` rule, with a variant based on `X-Forwarded-Proto` that suggests a proxy sits in front of the server. Éclair reads this header: it recognizes HTTPS without a redirect loop.

## Step 3: delete the welcome page

Infomaniak automatically places a welcome page at the root of the site. Yet its server looks for `index.html`, `index.htm`, `home.html`, `home.htm`, `default.html`, `default.htm` and `index.cgi` before `index.php`: a forgotten `index.html` can hide Éclair.

1. Open your site in the Manager, then **Page and Maintenance** in the left-hand menu.
2. Delete the welcome page with the trash can icon.

## Step 4: upload Éclair's files

1. Open your hosting, click **FTP / SSH** in the left-hand menu, then click **Web FTP**.
2. Go into `/sites/your-domain` and check that no `index.html` is left there.
3. Upload `eclair-cms-1.8.0.zip` (480 KB, far below the 50 MB limit), then unzip it.
4. Open the `eclair` folder that appears, select all of its contents, `.htaccess` included, and move them to `/sites/your-domain`.
5. Delete the empty `eclair` folder, the archive and the three `.txt` files that come with it.

Prefer FileZilla? An FTP, SSH and SFTP user was created along with your site; you manage it under **FTP / SSH**, from the account's **⋮** menu. Turn on **Server › Force showing hidden files**, then upload the contents of the `eclair` folder to `/sites/your-domain`.

![The contents of the eclair folder uploaded to the domain's /sites folder at Infomaniak](https://eclair.academy/media/2026/11/eclair-academy-upload-en.png)
*At Infomaniak, the contents of the eclair folder go to /sites/your-domain*

## Step 5: run the setup wizard

Open `https://your-domain.com`. If Infomaniak's welcome page still appears, go back to step 3. Otherwise, Éclair's wizard checks the server; the “Clean URLs (URL rewriting)” line must say “Active”, which proves the `.htaccess` is in place. Click **Let's go** and answer the 4 questions in [Install Éclair step by step](https://eclair.academy/en/paths/beginner/install-eclair), within 2 hours.

![First screen of Éclair's wizard with the Infomaniak server checks](https://eclair.academy/media/2026/11/eclair-academy-install-welcome-en.webp)
*The wizard's checks confirm PHP, HTTPS and URL rewriting*

## Step 6: check after installation

1. On the **Security** page, “Encrypted connection (HTTPS) enforced” and “Site address verified” must be ticked; if not, click **Verify the site address**.
2. The “Folder protection test” must show **Protected** for each file.
3. For the AI assistant, click **Test the connection** in **Settings › AI assistant**. If it fails, open an outgoing port (see below).

## Pitfalls specific to Infomaniak

- **`index.html` comes before `index.php`**: delete the welcome page, or add the line `DirectoryIndex index.php` at the top of Éclair's `.htaccess`, and add it again after each update.
- **A permanent PHP upgrade**: make the choice knowingly.
- **The `/sites/your-domain` folder**: older examples use `/web`. To change it, open your site, click **Manage** in the **Advanced settings** section, then **Save**.
- **Outgoing ports to open yourself**: whether port 443 is in the default list isn't documented. If the test fails, open **Security** in the Manager, then **Port Forwarding** (the port opening tool) and **Open a Port**, with one port and one destination address per rule.
- **The Web FTP leaves hidden files out of downloads**: a copy made this way has no `.htaccess`. Use Éclair's backup instead (**Security** page).
- **Hosting in Switzerland**, outside the European Union, with daily backups kept for 7 days in another data center.

## Install Éclair on Infomaniak: what if something goes wrong?

| Problem | Cause | Solution |
| --- | --- | --- |
| The welcome page still appears | `index.html` still present | Delete it in **Page and Maintenance** or in the Web FTP |
| 404 error on every page except the home page | `.htaccess` not moved | Move it from the `eclair` folder to `/sites/your-domain` |
| The PHP version you want doesn't appear | Hosting needs an update | Update the hosting, then go back to step 1 |
| “Can't reach Claude (Anthropic)…” | Outgoing port 443 closed | **Security › Port Forwarding** in the Manager, to `api.anthropic.com` |
| Redirect loop after an HTTPS rule | Rule without `X-Forwarded-Proto` | Use Infomaniak's variant, or delete the rule |

Éclair's other messages are explained on the [Troubleshooting](https://eclair.academy/en/docs/troubleshooting) page.

## Key points

- Choose PHP 8.3 or later under **Advanced**: the upgrade can't be undone.
- Delete the welcome page, because `index.html` comes before `index.php`.
- Extract the archive in `/sites/your-domain` with the Web FTP, then move the contents of the `eclair` folder up.
- Test outgoing connections and open a port if needed.

## Going further

- [Prepare your installation](https://eclair.academy/en/paths/beginner/prepare-installation) and [Install Éclair step by step](https://eclair.academy/en/paths/beginner/install-eclair).
- [Turn on the built-in AI assistant](https://eclair.academy/en/paths/ai-mcp/ai-assistant) and [Essential settings before launch](https://eclair.academy/en/paths/beginner/essential-settings).
- [Choosing your hosting](https://eclair.academy/en/hosting) to compare, and the [universal FTP method](https://eclair.academy/en/hosting/cpanel-plesk-directadmin).
- Infomaniak's official help: [install a Let's Encrypt certificate](https://www.infomaniak.com/en/support/faq/2130/install-a-free-lets-encrypt-ssl-certificate-on-a-site) and [all the FAQs](https://www.infomaniak.com/en/support).

## Frequently asked questions

### Which Infomaniak plan should I choose for Éclair?

Hébergement Web, from CHF 10.91 excl. VAT/month billed annually, with 20 sites included. The Hébergement Starter, free with a domain, only runs static pages.

### Why does my site still show the welcome page?

Because Infomaniak serves `index.html` before `index.php`. Delete the welcome page in **Page and Maintenance**, then reload your site.

### Can I go back to an older PHP version?

No: moving off a vulnerable version is irreversible at Infomaniak. Éclair needs PHP 8.1 or later and recommends 8.3 or later, so a recent version suits it.

### Does my data stay in Switzerland?

Infomaniak states that its infrastructure is developed and hosted in Switzerland. Its daily backups are kept in another data center.