2019-11-18 05:58:33 +01:00
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---
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title: Server Requirements
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icon: server
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summary: What you will need to run Silverstripe CMS on a web server
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---
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2011-02-07 07:48:44 +01:00
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# Requirements
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2019-11-18 05:58:33 +01:00
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Silverstripe CMS needs to be installed on a web server. Content authors and website administrators use their web browser
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2014-09-21 02:07:58 +02:00
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to access a web-based GUI to do their day-to-day work. Website designers and developers require access to the files on
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the server to update templates, website logic, and perform upgrades or maintenance.
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2011-02-07 07:48:44 +01:00
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DOCS Rewrite server requirements
* Remove overly specific PHP RNG instructions (that's just built into PHP7 through random_bytes now, which will throw if no suitable RNG is available)
* Remove PHP 5 RNG requirements, since we don't support that PHP release any mre
* Remove verbose explanation of PHP 5.6 support
* Remove conflicting instructions for PHP memory limits
* Remove version numbers from supporetd databases other than MySQL, it's up to the community modules to define that
* Remove Oracle support (code is nine years old!)
* Make "community supported" status clearer on databases, people can draw their own conclusions as open source users on Github
* Remove IIS version number, I think we should just stick to "needs web.config" and not give the impression that this is actively tested
* Remove mention of OSes for web servers, that's kind of irrelevant in today's hosting world (containers, PaaS, etc)
* Shorten install instructions in favour of a "quickstart" and point to lessons instead
* Remove mention of archive download option, we really shouldn't promote this - composer is the de-facto standard
* Add generic descriptions of the hosting environment considerations without going too much into specifics
* Remove Apache version number, we don't test on different versions, and really mostly rely on mod_rewrite working properly. Laravel does the same (doesn't claim specific Apache version support)
2019-09-03 06:07:17 +02:00
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## PHP
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* PHP >=7.1
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* PHP extensions: `ctype`, `dom`, `fileinfo`, `hash`, `intl`, `mbstring`, `session`, `simplexml`, `tokenizer`, `xml`
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* PHP configuration: `memory_limit` with at least `48M`
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* PHP extension for image manipulation: Either `gd` or `imagick`
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* PHP extension for a database connector (e.g. `pdo` or `mysqli`)
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Use [phpinfo()](http://php.net/manual/en/function.phpinfo.php) to inspect your configuration.
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## Database
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* MySQL >=5.6 (built-in, [commercially supported](https://www.silverstripe.org/software/addons/silverstripe-commercially-supported-module-list/))
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* PostgreSQL ([third party module](https://addons.silverstripe.org/add-ons/silverstripe/postgresql), community supported)
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* SQL Server ([third party module](https://addons.silverstripe.org/add-ons/silverstripe/mssql), community supported)
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* SQLite ([third party module](https://addons.silverstripe.org/add-ons/silverstripe/sqlite3), community supported)
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## Webserver Configuration
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### Overview
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SilverStripe needs to handle a variety of HTTP requests,
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and relies on the hosting environment to be configured securely to
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2019-09-04 05:34:36 +02:00
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enforce restrictions. There are secure defaults in place for Apache,
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DOCS Rewrite server requirements
* Remove overly specific PHP RNG instructions (that's just built into PHP7 through random_bytes now, which will throw if no suitable RNG is available)
* Remove PHP 5 RNG requirements, since we don't support that PHP release any mre
* Remove verbose explanation of PHP 5.6 support
* Remove conflicting instructions for PHP memory limits
* Remove version numbers from supporetd databases other than MySQL, it's up to the community modules to define that
* Remove Oracle support (code is nine years old!)
* Make "community supported" status clearer on databases, people can draw their own conclusions as open source users on Github
* Remove IIS version number, I think we should just stick to "needs web.config" and not give the impression that this is actively tested
* Remove mention of OSes for web servers, that's kind of irrelevant in today's hosting world (containers, PaaS, etc)
* Shorten install instructions in favour of a "quickstart" and point to lessons instead
* Remove mention of archive download option, we really shouldn't promote this - composer is the de-facto standard
* Add generic descriptions of the hosting environment considerations without going too much into specifics
* Remove Apache version number, we don't test on different versions, and really mostly rely on mod_rewrite working properly. Laravel does the same (doesn't claim specific Apache version support)
2019-09-03 06:07:17 +02:00
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but you should be aware of the configuration regardless of your webserver setup.
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2019-09-03 08:51:27 +02:00
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### Public webroot
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The webroot of your webserver should be configured to the `public/` subfolder.
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2019-09-04 05:34:36 +02:00
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Projects created prior to SilverStripe 4.1 might be using the main project
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2019-09-03 08:51:27 +02:00
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folder as the webroot. In this case, you are responsible for ensuring
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access to system files such as configuration in `*.yml` is protected
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from public access. We strongly recommend switching to more secure
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hosting via the `public/`. See [4.1.0 upgrading guide](/changelogs/4.1.0).
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DOCS Rewrite server requirements
* Remove overly specific PHP RNG instructions (that's just built into PHP7 through random_bytes now, which will throw if no suitable RNG is available)
* Remove PHP 5 RNG requirements, since we don't support that PHP release any mre
* Remove verbose explanation of PHP 5.6 support
* Remove conflicting instructions for PHP memory limits
* Remove version numbers from supporetd databases other than MySQL, it's up to the community modules to define that
* Remove Oracle support (code is nine years old!)
* Make "community supported" status clearer on databases, people can draw their own conclusions as open source users on Github
* Remove IIS version number, I think we should just stick to "needs web.config" and not give the impression that this is actively tested
* Remove mention of OSes for web servers, that's kind of irrelevant in today's hosting world (containers, PaaS, etc)
* Shorten install instructions in favour of a "quickstart" and point to lessons instead
* Remove mention of archive download option, we really shouldn't promote this - composer is the de-facto standard
* Add generic descriptions of the hosting environment considerations without going too much into specifics
* Remove Apache version number, we don't test on different versions, and really mostly rely on mod_rewrite working properly. Laravel does the same (doesn't claim specific Apache version support)
2019-09-03 06:07:17 +02:00
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### Filesystem permissions
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SilverStripe needs write access for the webserver user to `public/assets`,
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and read access for that user on everything else in your webroot.
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### Assets
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SilverStripe allows CMS authors to upload files into the `public/assets/` folder,
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which should be served by your webserver. **No PHP execution should be allowed in this folder**.
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This is configured for Apache by default via `public/assets/.htaccess`.
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The file is generated dynamically during the `dev/build` stage.
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Additionally, access is whitelisted by file extension through a
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dynamically generated whitelist based on the `File.allowed_extensions` setting
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(see [File Security](/developer_guides/files/file_security#file-types)).
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2020-02-14 03:23:20 +01:00
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This whitelist uses the same defaults configured through file upload
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through SilverStripe, so is considered a second line of defence.
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DOCS Rewrite server requirements
* Remove overly specific PHP RNG instructions (that's just built into PHP7 through random_bytes now, which will throw if no suitable RNG is available)
* Remove PHP 5 RNG requirements, since we don't support that PHP release any mre
* Remove verbose explanation of PHP 5.6 support
* Remove conflicting instructions for PHP memory limits
* Remove version numbers from supporetd databases other than MySQL, it's up to the community modules to define that
* Remove Oracle support (code is nine years old!)
* Make "community supported" status clearer on databases, people can draw their own conclusions as open source users on Github
* Remove IIS version number, I think we should just stick to "needs web.config" and not give the impression that this is actively tested
* Remove mention of OSes for web servers, that's kind of irrelevant in today's hosting world (containers, PaaS, etc)
* Shorten install instructions in favour of a "quickstart" and point to lessons instead
* Remove mention of archive download option, we really shouldn't promote this - composer is the de-facto standard
* Add generic descriptions of the hosting environment considerations without going too much into specifics
* Remove Apache version number, we don't test on different versions, and really mostly rely on mod_rewrite working properly. Laravel does the same (doesn't claim specific Apache version support)
2019-09-03 06:07:17 +02:00
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### Secure Assets
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Files can be kept in draft stage,
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and access restricted to certain user groups.
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These files are stored in a special `.protected` folder (defaulting to `public/assets/.protected`).
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**Requests to files in this folder should be denied by your webserver**.
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Requests to files in the `.protected` folder
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are routed to PHP by default when using Apache, through `public/assets/.htaccess`.
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If you are using another webserver, please follow our guides to ensure a secure setup.
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See [Developer Guides: File Security](/developer_guides/files/file_security) for details.
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2020-02-14 03:23:20 +01:00
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### Web Worker Concurrency
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It's generally a good idea to run multiple workers to serve multiple HTTP requests
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to SilverStripe concurrently. The exact number depends on your website needs.
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The CMS attempts to request multiple views concurrently.
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It also routes [protected and draft files](/developer_guides/files/file_security)
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through SilverStripe. This can increase your concurrency requirements,
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e.g. when authors batch upload and view dozens of draft files in the CMS.
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When allowing upload of large files through the CMS (through PHP settings),
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these files might be used as [protected and draft files](/developer_guides/files/file_security).
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Files in this state get served by SilverStripe rather than your webserver.
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Since the framework uses [PHP streams](https://www.php.net/manual/en/ref.stream.php),
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this allows serving of files larger than your PHP memory limit.
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Please be aware that streaming operations don't count towards
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PHP's [max_execution_time](https://www.php.net/manual/en/function.set-time-limit.php),
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which can risk exhaustion of web worker pools for long-running downloads.
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DOCS Rewrite server requirements
* Remove overly specific PHP RNG instructions (that's just built into PHP7 through random_bytes now, which will throw if no suitable RNG is available)
* Remove PHP 5 RNG requirements, since we don't support that PHP release any mre
* Remove verbose explanation of PHP 5.6 support
* Remove conflicting instructions for PHP memory limits
* Remove version numbers from supporetd databases other than MySQL, it's up to the community modules to define that
* Remove Oracle support (code is nine years old!)
* Make "community supported" status clearer on databases, people can draw their own conclusions as open source users on Github
* Remove IIS version number, I think we should just stick to "needs web.config" and not give the impression that this is actively tested
* Remove mention of OSes for web servers, that's kind of irrelevant in today's hosting world (containers, PaaS, etc)
* Shorten install instructions in favour of a "quickstart" and point to lessons instead
* Remove mention of archive download option, we really shouldn't promote this - composer is the de-facto standard
* Add generic descriptions of the hosting environment considerations without going too much into specifics
* Remove Apache version number, we don't test on different versions, and really mostly rely on mod_rewrite working properly. Laravel does the same (doesn't claim specific Apache version support)
2019-09-03 06:07:17 +02:00
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### URL Rewriting
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SilverStripe expects URL paths to be rewritten to `public/index.php`.
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For Apache, this is preconfigured through `.htaccess` files,
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and expects using the `mod_rewrite` module.
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By default, these files are located in `public/.htaccess` and `public/assets/.htaccess`.
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### HTTP Headers
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SilverStripe can add HTTP headers to reponses it handles directly.
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These headers are often sensitive, for example preventing HTTP caching for responses
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displaying data based on user sessions, or when serving protected assets.
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You need to ensure those headers are kept in place in your webserver.
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For example, Apache allows this through `Header setifempty` (see [docs](https://httpd.apache.org/docs/current/mod/mod_headers.html#header)).
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See [Developer Guide: Performance](/developer_guides/performance/)
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and [Developer Guides: File Security](/developer_guides/files/file_security) for more details.
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### Symlinks
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SilverStripe is a modular system, with modules installed and updated
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via the `composer` PHP dependency manager. These are usually stored in `vendor/`,
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outside of the `public/` webroot. Since many modules rely on serving frontend assets
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2019-09-04 05:31:24 +02:00
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such as CSS files or images, these are mapped over to the `public/_resources/` folder automatically.
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DOCS Rewrite server requirements
* Remove overly specific PHP RNG instructions (that's just built into PHP7 through random_bytes now, which will throw if no suitable RNG is available)
* Remove PHP 5 RNG requirements, since we don't support that PHP release any mre
* Remove verbose explanation of PHP 5.6 support
* Remove conflicting instructions for PHP memory limits
* Remove version numbers from supporetd databases other than MySQL, it's up to the community modules to define that
* Remove Oracle support (code is nine years old!)
* Make "community supported" status clearer on databases, people can draw their own conclusions as open source users on Github
* Remove IIS version number, I think we should just stick to "needs web.config" and not give the impression that this is actively tested
* Remove mention of OSes for web servers, that's kind of irrelevant in today's hosting world (containers, PaaS, etc)
* Shorten install instructions in favour of a "quickstart" and point to lessons instead
* Remove mention of archive download option, we really shouldn't promote this - composer is the de-facto standard
* Add generic descriptions of the hosting environment considerations without going too much into specifics
* Remove Apache version number, we don't test on different versions, and really mostly rely on mod_rewrite working properly. Laravel does the same (doesn't claim specific Apache version support)
2019-09-03 06:07:17 +02:00
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If the filesystem supports it, this is achieved through symlinks.
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Depending on your hosting and deployment mechanisms,
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2019-09-04 05:34:36 +02:00
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you may need to configure the plugin to copy files instead.
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DOCS Rewrite server requirements
* Remove overly specific PHP RNG instructions (that's just built into PHP7 through random_bytes now, which will throw if no suitable RNG is available)
* Remove PHP 5 RNG requirements, since we don't support that PHP release any mre
* Remove verbose explanation of PHP 5.6 support
* Remove conflicting instructions for PHP memory limits
* Remove version numbers from supporetd databases other than MySQL, it's up to the community modules to define that
* Remove Oracle support (code is nine years old!)
* Make "community supported" status clearer on databases, people can draw their own conclusions as open source users on Github
* Remove IIS version number, I think we should just stick to "needs web.config" and not give the impression that this is actively tested
* Remove mention of OSes for web servers, that's kind of irrelevant in today's hosting world (containers, PaaS, etc)
* Shorten install instructions in favour of a "quickstart" and point to lessons instead
* Remove mention of archive download option, we really shouldn't promote this - composer is the de-facto standard
* Add generic descriptions of the hosting environment considerations without going too much into specifics
* Remove Apache version number, we don't test on different versions, and really mostly rely on mod_rewrite working properly. Laravel does the same (doesn't claim specific Apache version support)
2019-09-03 06:07:17 +02:00
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See [silverstripe/vendor-plugin](https://github.com/silverstripe/vendor-plugin) for details.
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### Error pages
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The default installation includes [silverstripe/errorpage](https://addons.silverstripe.org/add-ons/silverstripe/errorpage),
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which generates static error pages that bypass PHP execution when those pages are published in the CMS.
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Once published, the static files are located in `public/assets/error-404.html` and `public/assets/error-500.html`.
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The default `public/.htaccess` file is configured to have Apache serve those pages based on their HTTP status code.
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### Other webservers (Nginx, IIS, Lighttpd)
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Serving through webservers other than Apache requires more manual configuration,
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since the defaults configured through `.htaccess` don't apply.
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Please apply the considerations above to your webserver to ensure a secure hosting environment.
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In particular, configure protected assets correctly to avoid exposing draft or protected files uploaded through the CMS.
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There are various community supported installation instructions for different environments.
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Nginx is a popular choice, see [Nginx webserver configuration](https://forum.silverstripe.org/t/nginx-webserver-configuration/2246).
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SilverStripe is known to work with Microsoft IIS, and generates `web.config` files by default
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(see [Microsoft IIS and SQL Server configuration](https://forum.silverstripe.org/t/microsoft-iis-webserver-and-sql-server-support/2245)).
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Additionally, there are community supported guides for installing SilverStripe
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on various environments:
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* [Hosting via Bitnami](https://bitnami.com/stack/silverstripe/virtual-machine): In the cloud or as a locally hosted virtual machine
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* [Vagrant/Virtualbox with CentOS](https://forum.silverstripe.org/t/installing-via-vagrant-virtualbox-with-centos/2248)
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2019-09-04 05:32:41 +02:00
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* [macOS with Homebrew](https://forum.silverstripe.org/t/installing-on-osx-with-homebrew/2247)
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2019-09-04 05:34:36 +02:00
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* [macOS with MAMP](https://forum.silverstripe.org/t/installing-on-osx-with-mamp/2249)
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DOCS Rewrite server requirements
* Remove overly specific PHP RNG instructions (that's just built into PHP7 through random_bytes now, which will throw if no suitable RNG is available)
* Remove PHP 5 RNG requirements, since we don't support that PHP release any mre
* Remove verbose explanation of PHP 5.6 support
* Remove conflicting instructions for PHP memory limits
* Remove version numbers from supporetd databases other than MySQL, it's up to the community modules to define that
* Remove Oracle support (code is nine years old!)
* Make "community supported" status clearer on databases, people can draw their own conclusions as open source users on Github
* Remove IIS version number, I think we should just stick to "needs web.config" and not give the impression that this is actively tested
* Remove mention of OSes for web servers, that's kind of irrelevant in today's hosting world (containers, PaaS, etc)
* Shorten install instructions in favour of a "quickstart" and point to lessons instead
* Remove mention of archive download option, we really shouldn't promote this - composer is the de-facto standard
* Add generic descriptions of the hosting environment considerations without going too much into specifics
* Remove Apache version number, we don't test on different versions, and really mostly rely on mod_rewrite working properly. Laravel does the same (doesn't claim specific Apache version support)
2019-09-03 06:07:17 +02:00
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* [Windows with WAMP](https://forum.silverstripe.org/t/installing-on-windows-via-wamp/2250)
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* [Vagrant with silverstripe-australia/vagrant-environment](https://github.com/silverstripe-australia/vagrant-environment)
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* [Vagrant with BetterBrief/vagrant-skeleton](https://github.com/BetterBrief/vagrant-skeleton)
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## PHP Requirements for older SilverStripe releases {#php-support}
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2019-04-30 03:07:16 +02:00
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SilverStripe's PHP support has changed over time and if you are looking to upgrade PHP on your SilverStripe site, this table may be of use:
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| SilverStripe Version | PHP Version | More information |
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| -------------------- | ----------- | ---------------- |
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| 3.0 - 3.5 | 5.3 - 5.6 | [requirements docs](https://docs.silverstripe.org/en/3.4/getting_started/server_requirements/)
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| 3.6 | 5.3 - 7.1 | |
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| 3.7 | 5.3 - 7.3 | [changelog](https://docs.silverstripe.org/en/3/changelogs/3.7.0/) |
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| 4.0 - 4.4 | 5.6+ | |
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| 4.5+ (unreleased) | 7.1+ | [blog post](https://www.silverstripe.org/blog/our-plan-for-ending-php-5-6-support-in-silverstripe-4/) |
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DOCS Rewrite server requirements
* Remove overly specific PHP RNG instructions (that's just built into PHP7 through random_bytes now, which will throw if no suitable RNG is available)
* Remove PHP 5 RNG requirements, since we don't support that PHP release any mre
* Remove verbose explanation of PHP 5.6 support
* Remove conflicting instructions for PHP memory limits
* Remove version numbers from supporetd databases other than MySQL, it's up to the community modules to define that
* Remove Oracle support (code is nine years old!)
* Make "community supported" status clearer on databases, people can draw their own conclusions as open source users on Github
* Remove IIS version number, I think we should just stick to "needs web.config" and not give the impression that this is actively tested
* Remove mention of OSes for web servers, that's kind of irrelevant in today's hosting world (containers, PaaS, etc)
* Shorten install instructions in favour of a "quickstart" and point to lessons instead
* Remove mention of archive download option, we really shouldn't promote this - composer is the de-facto standard
* Add generic descriptions of the hosting environment considerations without going too much into specifics
* Remove Apache version number, we don't test on different versions, and really mostly rely on mod_rewrite working properly. Laravel does the same (doesn't claim specific Apache version support)
2019-09-03 06:07:17 +02:00
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## CMS browser requirements
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2011-02-07 07:48:44 +01:00
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2018-10-30 00:28:00 +01:00
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SilverStripe CMS supports the following web browsers:
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* Google Chrome
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* Internet Explorer 11
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* Microsoft Edge
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DOCS Rewrite server requirements
* Remove overly specific PHP RNG instructions (that's just built into PHP7 through random_bytes now, which will throw if no suitable RNG is available)
* Remove PHP 5 RNG requirements, since we don't support that PHP release any mre
* Remove verbose explanation of PHP 5.6 support
* Remove conflicting instructions for PHP memory limits
* Remove version numbers from supporetd databases other than MySQL, it's up to the community modules to define that
* Remove Oracle support (code is nine years old!)
* Make "community supported" status clearer on databases, people can draw their own conclusions as open source users on Github
* Remove IIS version number, I think we should just stick to "needs web.config" and not give the impression that this is actively tested
* Remove mention of OSes for web servers, that's kind of irrelevant in today's hosting world (containers, PaaS, etc)
* Shorten install instructions in favour of a "quickstart" and point to lessons instead
* Remove mention of archive download option, we really shouldn't promote this - composer is the de-facto standard
* Add generic descriptions of the hosting environment considerations without going too much into specifics
* Remove Apache version number, we don't test on different versions, and really mostly rely on mod_rewrite working properly. Laravel does the same (doesn't claim specific Apache version support)
2019-09-03 06:07:17 +02:00
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* Mozilla Firefox
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2018-10-30 00:28:00 +01:00
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We aim to provide satisfactory experiences in Apple Safari. SilverStripe CMS works well across Windows, Linux, and Mac operating systems.
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2011-02-07 07:48:44 +01:00
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2014-09-21 02:07:58 +02:00
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## End user requirements
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2011-02-07 07:48:44 +01:00
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2014-09-21 02:07:58 +02:00
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SilverStripe CMS is designed to make excellent, standards-compliant websites that are compatible with a wide range of
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industry standard browsers and operating systems. A competent developer is able to produce websites that meet W3C
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2015-01-13 20:59:55 +01:00
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guidelines for HTML, CSS, JavaScript, and accessibility, in addition to meeting specific guide lines, such as
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2014-09-21 02:07:58 +02:00
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e-government requirements.
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