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| Gallery has certain technical requirements that must be met (i.e. installed and/or configured) on your server '''before''' you attempt to install it.
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| ==Web Server==
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| ===Apache===
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| '''Apache''' ([http://httpd.apache.org/docs/ Apache 1], [http://httpd.apache.org/docs-2.0/ Apache 2]) is the most popular web server in the world, and is the one recommended by the Gallery Team for use with Gallery 2.
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| It can be downloaded from the [http://httpd.apache.org Apache HTTPD Project's site]
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| ===IIS===
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| Microsoft's '''[http://www.microsoft.com/WindowsServer2003/iis/default.mspx IIS]''' (Internet Information Services) web server has also been known to work. But there are some limitations. See [[Gallery:Known_Issues|Known Issues]] for details. Short URLs work, but G1 redirects are not yet supported for IIS. Also take a look at our [[Gallery:Installation_on_Windows_Server_2003_and_IIS6|Windows Server 2003 and IIS 6 Howto]].
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|
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| ===Zeus, ...===
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| There are a lot of alternative web servers. G2 should work on any web server that can run PHP. But short URLs / G1 redirects (URL rewrite module) probably do not work with all of them.
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| ==PHP==
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| Gallery is written in '''PHP''' (recursive acronym for '''PHP: Hypertext Preprocessor'''). It is one of the most popular, free web-based languages in the world today. It can also be downloaded gratis from the [http://www.php.net PHP Project's site].
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| === PHP Version Compatibility ===
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| Gallery requires at least version 4.x (4.1.0 or more recent; Gallery 2.2 requires 4.3.0 or more recent) or 5.x (5.0.4 or more recent) to function properly. Note: Gallery 2 has [http://codex.gallery2.org/index.php/Gallery2:FAQ#install.2Findex.php_is_blank_or_shows_an_error._What.27s_wrong.3F problems with PHP 5.0.5 due to a bug in PHP ].
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| :'''Notes:'''
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| * '''PHP 5 is highly recommended''' - [http://php.net/ PHP] will not release any security updates for PHP 4 after 2008/08/08. If your webhost is still running PHP 4, please ask them to switch to PHP 5 as soon as possible for security reasons (not just for Gallery, but for all PHP applications).
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| * '''Gallery 2.4 (due in 2008) will require PHP 5.2 or later''', announcement: [http://gallery.menalto.com/gallery_2_and_php5 Gallery 2 Gallery 2 Requiring PHP 5 in February 2008]
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| * PHP 6 is incompatible with Gallery 2.0 - 2.3. Gallery 2.4 (first release in 2008) is planned to be compatible with PHP 6 though.
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|
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| ===PHP Settings===
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| In addition to a basic PHP installation, Gallery requires certain PHP settings to be setup correctly in order to function optimally.
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| PHP settings can be changed in php.ini, as described in the [http://www.php.net/configuration.changes PHP documentation]
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| *'''[http://www.php.net/features.safe-mode safe_mode]''' safe_mode '''must be disabled''' in order for Gallery to work correctly
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| *'''[http://www.php.net/features.safe-mode#ini.disable-functions disable_functions]''' The disable_functions directive must not include the function '''set_time_limit'''.
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| *'''[http://www.php.net/features.file-upload file_uploads]''' file_uploads must be set to '''On''' if Gallery is to be able to upload files from your computer
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| *'''[http://www.php.net/manual/en/ini.core.php#ini.upload-max-filesize upload_max_filesize]''' and '''[http://www.php.net/manual/en/ini.core.php#ini.post-max-size post_max_size]''' These configuration parameters control the maximum file size that can be uploaded. Adjust these from the default '''2M''' setting to something larger if you have problems uploading pictures from higher resolution cameras.
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| *If you want to use the localization feature then PHP should be configured with the '''[http://www.php.net/manual/en/ref.gettext.php gettext]''' option enabled.
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| [[User:alindeman|alindeman]] has created a script to check your Gallery for potential problems due to PHP settings. [[Downloads:GHCC|Download]] the script and upload it to your host. Open the script in your browser ({{exampleurl|/ghcc.php}}). If any tests fail, you may need to adjust your settings before trying to install Gallery.
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| ==Database==
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| Gallery 2 requires one of the following database management systems (DBMS): '''[http://mysql.com/ MySQL]''' 3.x or 4.x, 5.x, '''[http://www.postgresql.org/ PostgreSQL]''' 7.x, 8.x, '''[http://www.oracle.com/ Oracle]''' 9i or 10g, '''[http://www.ibm.com/software/data/db2/ IBM DB2]''' 8.2, '''[http://www.microsoft.com/sql/ Microsoft SQL Server]'''
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| :'''Note:''' MS SQL Server has only limited support for international characters (unicode). Read more at [[Gallery:MSSQL|Limitations of Microsoft SQL Server]]
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| Additional RDBMS specific notes:
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| * [[Gallery:DB2]]
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| * [[Gallery:MSSQL]]
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| * [[Gallery:MySQL]]
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| * [[Gallery:Oracle]]
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| * [[Gallery:PostgreSQL]]
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| ==Image Processing Library==
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| Gallery 2 requires either '''[http://netpbm.sourceforge.net NetPBM]''' 9.x or newer, '''[http://www.imagemagick.org ImageMagick]''' 4.x or newer, '''[http://php.net/gd GD]''' 2.x or newer, or '''[http://www.graphicsmagick.org GraphicsMagick]''' 1.x or newer in order to operate (e.g. generate thumbnails) on your images and photographs.
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| More information on how to install an image processing library is explained on [[Installing an Image Processing Library]]
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| ==Optional Items==
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| ===mod_rewrite===
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| '''[http://httpd.apache.org/docs/mod/mod_rewrite.html mod_rewrite]''' is an Apache server extension that enables your Gallery 2 to use "short URLs." That is, instead of
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| ''<nowiki>http://www.example.com/gallery/main.php?g2_view=core.ShowItem&g2_itemId=17&g2_serialId=2</nowiki>''
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| the URL would be reduced to
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| {{exampleurl|/v/albumName}}
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| Gallery 2 will attempt to automatically check for the presence of '''[http://httpd.apache.org/docs/mod/mod_rewrite.html mod_rewrite]''' during the installation process if you select the URL rewrite module.
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| ===ffmpeg===
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| If the Ffmpeg module is activated, it will automatically create thumbnails for movies. The ffmpeg module requires the [http://ffmpeg.mplayerhq.hu/ ffmpeg] binary. If you have shell access to the server, you can install ffmpeg with the packaging system of your linux distribution.
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| * [http://wiki.dreamhost.com/index.php/FFmpeg Dreamhost] directions (should be similar to most hosts.
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| Windows:
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| * For MS Windows, we offer a pre-compiled binary on [http://sourceforge.net/project/showfiles.php?group_id=7130&package_id=14464 our sf.net download page].
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| Other OSs:
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| * You can try http://langleycom.com/gallery_download/ffmpeg for one for freebsd. It has some issues ( some formats not supported) but it might help.
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| * Try http://perso.mine.nu/?p=76&language= for a precompiled version for linux.
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| * Try http://www.flashyourweb.com/filemgmt/visit.php?lid=11 for another precompiled version for linux. (14B)
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| * If you have a "Unix DAV/1.0.3" server try this thread: http://gallery.menalto.com/node/36596#comment-141996 it is from Dream Host.
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| * [http://wiki.dreamhost.com/index.php/FFmpeg Dreamhost] directions (should be similar to most hosts.
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| * If you get a error about; ''while loadingshared libraries'' see: [http://lists.mplayerhq.hu/pipermail/ffmpeg-user/2006-December/005644.html ffmpeg list]
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| Mac OS:
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| If you are using Gallery2 on Mac OS X, then you need to [[Gallery:Modules:ffmpeg#Usage|read the steps on this wiki page]] to get/install ffmpeg and configure the ffmpeg Gallery2 module.
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| ===dcraw===
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| Dcraw is a graphics toolkit that can be used to process RAW images produced by high end digital cameras. You must install the [http://www.cybercom.net/~dcoffin/dcraw/ dcraw] binary to activate the dcraw module in G2.
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| ===jhead===
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| '''[http://www.sentex.net/~mwandel/jhead/ jhead]''' is a free tool that can be used to extract '''[http://www.exif.org/ EXIF]''' data from images, which most digital cameras now add to photos. If enabled, '''[http://www.exif.org/ EXIF]''' data will be preserved when operating with the netpbm toolkit on your original photos in G2. You don't need jhead for the EXIF features in G2, a library written in PHP is used to extract the EXIF data from images. Imagemagick and GD don't need jhead to preserve the exif data when manipulating images.
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| ===infozip===
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| '''[http://www.info-zip.org/pub/infozip/ infozip]''' is a free tool that allows Gallery to unzip ZIP archives so that you can easily upload multiple photos. If enabled, you will be able to upload a ZIP archive as you would any other single picture, and Gallery will add all the images in the archive.
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| ===zip / unzip===
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| zip is required for the zip download module and unzip for the archive upload module. Most linux / unix based platforms already have these binaries. For MS Windows, the zip.exe / unzip.exe binaries from [http://www.cygwin.com/ cygwin] are also an alternative, make sure you select the zip tool under archive during the install (it will not install by default), it is located in /bin/.
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| [[Category:Gallery 2:Installation|Requirements]]
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