doc: update PHP compatibility table

[github/shaarli/Shaarli.git] / doc / md / Server-configuration.md

diff --git a/doc/md/Server-configuration.md b/doc/md/Server-configuration.md
index ca82b2ec7cd63c558717cee9ffb430a8459d4578..78083a466729e2b7466f9d017823a99edaa160fa 100644 (file)
--- a/doc/md/Server-configuration.md
+++ b/doc/md/Server-configuration.md
@@ -18,7 +18,7 @@ Version | Status | Shaarli compatibility
 7.2 | Supported | Yes
 7.1 | Supported | Yes
 7.0 | Supported | Yes
-5.6 | Supported | Yes
+5.6 | EOL: 2018-12-31 | Yes (up to Shaarli 0.10.x)
 5.5 | EOL: 2016-07-10 | Yes
 5.4 | EOL: 2015-09-14 | Yes (up to Shaarli 0.8.x)
 5.3 | EOL: 2014-08-14 | Yes (up to Shaarli 0.8.x)
@@ -29,7 +29,7 @@ Extension | Required? | Usage
 ---|:---:|---
 [`openssl`](http://php.net/manual/en/book.openssl.php) | All | OpenSSL, HTTPS
 [`php-mbstring`](http://php.net/manual/en/book.mbstring.php) | CentOS, Fedora, RHEL, Windows, some hosting providers | multibyte (Unicode) string support
-[`php-gd`](http://php.net/manual/en/book.image.php) | optional | thumbnail resizing
+[`php-gd`](http://php.net/manual/en/book.image.php) | optional | required to use thumbnails
 [`php-intl`](http://php.net/manual/en/book.intl.php) | optional | localized text sorting (e.g. `e->è->f`)
 [`php-curl`](http://php.net/manual/en/book.curl.php) | optional | using cURL for fetching webpages and thumbnails in a more robust way
 [`php-gettext`](http://php.net/manual/en/book.gettext.php) | optional | Use the translation system in gettext mode (faster)
@@ -397,6 +397,7 @@ http {
 ```
 
 ## Proxies
+
 If Shaarli is served behind a proxy (i.e. there is a proxy server between clients and the web server hosting Shaarli), please refer to the proxy server documentation for proper configuration. In particular, you have to ensure that the following server variables are properly set:
 
 - `X-Forwarded-Proto`
@@ -405,6 +406,12 @@ If Shaarli is served behind a proxy (i.e. there is a proxy server between client
 
 See also [proxy-related](https://github.com/shaarli/Shaarli/issues?utf8=%E2%9C%93&q=label%3Aproxy+) issues.
 
+## Robots and crawlers
+
+Shaarli disallows indexing and crawling of your local documentation pages by search engines, using `<meta name="robots">` HTML tags.
+Your Shaarli instance and other pages you host may still be indexed by various robots on the public Internet.
+You may want to setup a robots.txt file or other crawler control mechanism on your server.
+See [[1]](https://en.wikipedia.org/wiki/Robots_exclusion_standard), [[2]](https://support.google.com/webmasters/answer/6062608?hl=en) and [[3]](https://developers.google.com/search/reference/robots_meta_tag)
 
 ## See also