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! Server Settings Checker
Download the server settings checker below, upload it to your server and point your browser at it. This should give you an overview of your servers settings and will allow you to determine if bitweaver can be installed on the server:
{attachment id=547 size=200px align=center}

! Generic Requirements
Bitweaver is written in PHP and thus requires PHP and a webserver such as Apache or IIS

!!Operation Systems Supported
Any system that can run a webserver and a database can run bitweaver. The most common ones include:
* Linux
* Windows
* Mac

!!Databases Supported
You will need access to a table on any one of these databases:
* [http://www.merchantos.com/|Point of Sale Software] (tested)
* [http://www.mysql.com/|MySQL] (tested extensively)
* [http://www.postgresql.org/|PostgreSQL] (tested extensively)
* [http://www.oracle.com/|Oracle] (needs some more testing)
* [http://www.sybase.com/|Sybase] (not tested much yet)
* [http://www.firebirdsql.org/|Firebird] (tested extensively but check ((DatabaseTestsAndFixes-Firebird|version notes)))
* [http://www.sqlite.org/|SQLite] (not tested much yet)

!PHP Settings
The settings below are required by bitweaver to run. If any of these settings are not met, you will have to change these before you can continue with the installation process.

!!Required settings
Make sure that
*PHP version is greater than 4.1.0.
+(Firebird installations require PHP5 for enhanced driver module).
* Required PHP Modules (Libraries support) :
**[http://www.zlib.net/|zlib] compression support is available.
**php_session (default on most distros except suse)
**An image process ( gd or ImageMagick )
*the configuration file 'kernel/config_inc.php' is available and the file is writeable by web server.
*the directories 'storage/' and 'temp/' are writeable too.

!!Recommended settings
The following are settings that aren't strictly required by bitweaver to run, but are recommendations.

However, bitweaver will still operate if your settings do not quite match those recommended.

||__==Setting==__ |__==Should Be==__
Memory Limit |at least 16M
Safe Mode |OFF
Display Errors |ON
File Uploads |ON
Magic Quotes GPC |OFF
Magic Quotes Runtime |OFF
Magic Quotes Sybase |OFF
Register Globals |OFF
Output Buffering |OFF
Session auto start |OFF||

!!Recommended Extensions
bitweaver takes advantage of particular PHP extensions for full functionality. If any of these extensions are not available to bitweaver, particular features might not work and it might even render particular packages useless.

!!!!eAccelerator
[http://eaccelerator.net/HomeUk
|eAccelerator] increases the efficiency of php by caching and optimising queries. Using this extension will greatly increase your servers performance and reduce the memory needed to run bitweaver.

!!!!gd
[http://www.boutell.com/gd/GD Libraries] are used to manipulate images. We use these libraries to create thumbnails and convert images from one format to another. The GD libaries are quite limited and __don't support__ a number of image formats including __bmp__. If you are planning on uploading and using a lot of images, we recommend you use one of the other image processors.
If you are running Red Hat or Fedora Core, you can try running: yum install php-gd.

!!!!MagicWand
MagickWand the newer php extension for ImageMagick. For installation help, please view our online documentation: [http://www.bitweaver.org/wiki/ImageMagick|ImageMagick and MagickWand installation instructions] or visit the [http://www.imagemagick.org/|ImageMagick] homepage.

!!Recommended PEAR Extensions
PEAR provides extensions to php, which can easily be installed and updated using the pear interface on linux. None of the extenstions below are required, they always provide an alternative to the existing methods available. Often these alternatives are superior to the default methods.

To make use of PEAR extensions, you need to make sure that [http://pear.php.net/|PEAR] is installed and the include_path is set in your php.ini file.

!!!!PEAR::Auth
The PEAR::Auth package allows you to authenticate users on your website.
''Install using this command:''
pear install --onlyreqdeps Auth;

!!!!PEAR::Text_Wiki
Having PEAR::Text_Wiki installed will make more wiki format parsers available. The following parsers will be recognised and used: Text_Wiki_BBCode, Text_Wiki_Cowiki, Text_Wiki_Creole, Text_Wiki_Doku, Text_Wiki_Mediawiki, Text_Wiki_Tiki
"Install using this command:"
pear install --onlyreqdeps Text_Wiki_BBCode Text_Wiki_Cowiki Text_Wiki_Creole Text_Wiki_Doku Text_Wiki_Mediawiki Text_Wiki_Tiki;

!!!!PEAR::Text_Diff
PEAR::Text_Diff makes inline diffing of content available.
"Install using this command:"
pear install --onlyreqdeps Text_Diff;

!!!!PEAR::Image_Graphviz
Pear::Image_Graphviz makes the {graphviz} plugin available. With it you can draw maps of how your wiki pages are linked to each other. This can be used for informational purposes or a site-map.
It also requires the application graphviz to be installed as well.
"Install using this command:"
pear install --onlyreqdeps Image_Graphviz;

!!!!PEAR::HTMLPurifier
HTMLPurifier is an advanced system for defending against Cross Site Scripting (XSS) attacks and ensuring that all code on your site is standards compliant. It is highly recommended if you are going to allow HTML submission to your site. It is not required if you are only going to use a wiki format like tikiwiki or bbcode. You alse need to enable it in the liberty plugins administration after installation. See ((HTMLPurifier)) and [http://htmlpurifier.org] for more information.
"Install using this command:"
pear channel-discover htmlpurifier.org;
pear install hp/HTMLPurifier;

!!!!PEAR::HTTP_Download
((TreasuryPackage|Treasury)) - the file manager of bitweaver - can make use of PEAR::HTTP_Download to provide more reliable downloads and download resume support when using a download manager.
"Install using this command:"
pear install --alldeps HTTP_Download;

PEAR extensions can be installed in any of these ways:
* Install PEAR extensions using [http://pear.php.net/manual/en/installation.cli.php|command line interface] (requires ssh access).
* Install PEAR extensions in a [http://pear.php.net/manual/en/installation.shared.php|shared environment] (requires ssh access or ftp access).
* Download a [/storage/users/27/27/treasury/727/pear.zip|pre-packed set of bitweaver PEAR extensions] and extract this to /yourbitweaver/util/pear/. This solution might be easiest for users in a shared environment.


!Recommended Software
These files are not mandatory but will enable you to perform certain tasks. We generally try to avoid using external applications, but sometimes it's the easiest and quickest way to achieve a certain goal.

Please bear in mind that certain bitweaver features will not be available if the applications bitweaver uses are not available (e.g.: if unzip is not available, .zip files cannot be processed after uploading them).

!!!!Ghostscript
[http://www.cs.wisc.edu/~ghost/|GhostScript] is an interpreter for the PostScript language and for PDF and is used to create PDF previews when uploading PDFs to fisheye. If you do not have this installed, previews of PDF files will not be generated on upload.

!!!!tar
Tarball is a common archiving format on Linux and [http://www.gnu.org/software/tar/|tar] is used to extract .tar files.

!!!!bzip2
Bzip is a common compression format on Linux and [http://www.bzip.org/|bzip2] is used to extract .bz2 and in combination with tar .tar.bz2 file.

!!!!gzip
Gzip is a common compression format on Linux and [http://www.gnu.org/software/gzip/gzip.html|gzip] is used to extract .gz and in combination with tar .tar.gz file.

!!!!unzip
Zip is a common compression format on all operating systems and [http://www.info-zip.org/|unzip] is used to extract .zip files.

!!!!unrar
Rar is a common compression format on all operating systems and [http://www.rarlab.com/rar_add.htm|unrar] is used to extract .rar files.

!!!!Graphviz
[http://www.graphviz.org/|Graphviz] is a way of representing structural information as diagrams of abstract graphs and networks and visualizing that representation. It is used by the {graphviz} liberty plugin and you only need to install it if you intend to enable that plugin.
"The Pear::Image_Graphviz plugin is required as well."

!!Settings worth knowing about
The following settings are merely for your information and are meant to help you work out problems that might occur.

__File Uploads__ specifies whether you are allowed to upload files
recommended __On__.

__Maximum post size__ will restrict the size of files when you upload a file using a form
recommended __8M__.

__Upload max filesize__ is related to maximim post size and will also limit the size of uploads
recommended __8M__.

__Maximum execution time__ is related to time outs in PHP - affects database upgrades and backups
recommended __60__.
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