Issue #3180889 by jhodgdon, antoine_moulin, Amber Himes Matz, eojthebrave:...

===== PHP

PHP 7.2 or higher. PHP must be set up with a minimum memory size of 64MB; if you

are running multiple modules on your site or using memory-intensive PHP-based

command-line tools (such as Composer), considerably more memory than that may be

needed.

PHP 7.3 or a higher PHP 7 version. PHP must be set up with a minimum memory size

of 64MB; if you are running multiple modules on your site or using

memory-intensive PHP-based command-line tools (such as Composer), considerably

more memory than that may be needed.

Certain PHP extensions are also required; the exact list of required PHP

extensions depends on how you install the core software and which modules you

Apache (Recommended)::

  Apache is the most commonly used web server. The core software will work on

  Apache 2.x hosted on UNIX/Linux, OS X, or Windows that have the Apache

  mod_rewrite module installed and enabled. The Apache VirtualHost configuration

  must contain the directive _AllowOverride All_ to allow the _.htaccess_ file

  to be used.

  Apache 2.4.7 or higher hosted on UNIX/Linux, OS X, or Windows that have the

  Apache mod_rewrite module installed and enabled. The Apache VirtualHost

  configuration must contain the directive _AllowOverride All_ to allow the

  _.htaccess_ file to be used.

PHP Local Server::

  You can temporarily run a local demo site on your computer using just PHP,

  without installing web server software.

Nginx::

  Nginx is a commonly used web server that focuses on high concurrency,

  performance and low memory usage. The core software will work on Nginx 1.1 or

  performance and low memory usage. The core software will work on Nginx 0.7 or

  greater hosted on UNIX/Linux, OS X, or Windows. The ngx_http_rewrite_module

  must be installed and enabled.

Microsoft IIS::

  Microsoft IIS is a web server and set of feature extension modules for use

  with Microsoft Windows. The core software will work with IIS 5, IIS 6, or IIS

  7 if PHP is configured correctly. Because clean URLs are required, you may

  need to use a third party product. For IIS 7, you can use the Microsoft URL

  with Microsoft Windows. The core software will work with IIS 5, 6, 7, 8, or

  10 if PHP is configured correctly. Because clean URLs are required, you may

  need to use a third party product. For IIS 7/8, you can use the Microsoft URL

  Rewrite module or a third party solution.

===== Database

Use one of the following databases:

* MySQL - 5.5.3 (MariaDB 5.5.20, Percona 5.5.8) or higher with an

* MySQL - 5.7.8 (MariaDB 10.3.7, Percona 5.7.8) or higher with an

InnoDB-compatible primary storage engine

* PostgreSQL - 9.1.2 or higher

* PostgreSQL - 10.0 or higher with the pg_trgm extension

* SQLite - 3.4.2 or higher. Temporary local demo sites use SQLite, which is

* SQLite - 3.26 or higher. Temporary local demo sites use SQLite, which is

distributed as part of PHP and doesn't require installing separate database

software.

software, but make sure your version of PHP has the minimum SQLite included.

//==== Related topics