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ELGG 1.0 INSTALLATION INSTRUCTIONS
TECHNICAL REQUIREMENTS
Elgg runs on a combination of the Apache web server, MySQL database
system and the PHP interpreted scripting language. This is the most
popular web server environment in the world.
Due to Elgg's advanced functionality, there are some extra
configuration requirements:
* The Apache web server needs to be installed with the following
modules:
o mod_rewrite
o PHP
* MySQL 5+ is needed for data storage
* PHP 5.2+ needs to be installed as an Apache module (not in CGI
mode or safe mode) with the following libraries:
o GD (for graphics processing, eg user icon rescaling)
o JSON (for API functionality)
It is recommended that you increase the memory available to PHP
threads beyond the standard 8 or 12M, and increase the maximum
uploaded filesize (which defaults to 2M). In both cases, this can be
found in your php.ini.
* The following PHP libraries are also recommended for some
plugins and extra functionality:
o mbstring (to allow emails to be sent with non-Latin
characters)
o SOAP
o DOM
INSTALLING ELGG
Before you begin, make sure you have read Elgg's technical
requirements. If you discover problems after following these
instructions, check out the troubleshooting page at
[http://docs.elgg.org/wiki/Troubleshooting].
1. Upload Elgg
Unzip Elgg and upload it to your site's document root.
2. Create a data folder
Elgg needs a special folder to store uploaded files, including
profile icons and photos. You will need to create this for it.
We recommend that this folder is called data, and is stored outside
of your document root. For example, if Elgg is installed in
/home/elgg/html/, you might create it in /home/elgg/data.
Once this folder has been created, you'll need to make sure Elgg has
permission to write to it. This shouldn't be a problem on Windows-
based servers, but if your server runs Linux or a UNIX variant,
you'll need to type something like:
chmod 777 /home/elgg/data/
If you use a graphical client to upload files, you can usually set
this by right or shift-clicking on the folder and selecting
'properties'.
3. Create a database
Using your database administration tool of choice (if you're unsure
about this, ask your system administrator), create a new database for
Elgg. Make sure you know the username and password necessary to
access this.
4. Visit your Elgg site
Once you've performed these steps, visit your Elgg site in your web
browser. Elgg will take you through the rest of the installation
process from there.
A note on settings and .htaccess
The Elgg installer will try and create two files for you:
* engine/settings.php, which contains the database settings for
your installation
* .htaccess, which allows Elgg to generate dynamic URLs
If these files can't be automatically generated, for example because
you don't have the correct directory permissions, Elgg will tell you
how to create them. If, for some reason, this won't work, you will
need to:
* Copy engine/settings.example.php to engine/settings.php, open
it up in a text editor and fill in your database details
* Copy /htaccess_dist to /.htaccess
The latest version of this document is available at:
[http://docs.elgg.org/wiki/Installation]
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