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Upload Variables

See also: Uploads, Uploads admin.

%apply=item id=Enable Upload?%$EnableUpload

The upload.php script is automatically included from stdconfig.php if the $EnableUpload variable is true in config.php. Note that one may still need to set an upload password before users can upload (see UploadsAdmin).

%apply=item id=Upload Blacklist?%$UploadBlacklist

This array contains forbidden strings for an uploaded file (case insensitive). Some installations with the Apache server will try to execute a file which name contains ".php", ".pl" or ".cgi" even if it is not the last part of the filename. For example, a file named "test.php.txt" may be executed. To disallow such files to be uploaded, add to config.php such a line:

$UploadBlacklist = array('.php', '.pl', '.cgi', '.py'); # disallow common script files

%apply=item id=Upload Perm Add?%$UploadPermAdd

This variable sets additional unix permissions applied to newly uploaded files, and should be 0 (recommended as of 2013). If uploaded files cannot be downloaded and displayed on the website, for example with the error 403 Forbidden, set this value to 0444 (core setting, default since 2004).

$UploadPermAdd = 0; # recommended

%apply=item id=Upload Perm Set?%$UploadPermSet

This variable sets unix permissions unconditionally applied to newly uploaded files, for example 0604. Danger! Do not use this variable unless you know what you're doing! If you make a mistake, uploaded files may be impossible to edit or delete via the FTP/SSH account (in that case, Cookbook:Attachtable may be used) or to be downloaded and displayed on the website. Note that file permissions may differ on different systems - if you copy or move your Pm Wiki installation, you may have to change it.

%apply=item id=Upload Dir?%$UploadDir

The directory where uploads are to be stored. Defaults to uploads/ in the pmwiki directory, but can be set to any location on the server. This directory must be writable by the webserver process if uploading is to occur.

%apply=item id=Upload Url Fmt?%$UploadUrlFmt

The url of the directory given by $UploadDir. By default, $UploadUrlFmt is derived from $PubDirUrl and $UploadDir.

$IMapLinkFmt['Attach:']

The format of the upload link displayed when an attachment exists. Can be changed with such a line in config.php:

$IMapLinkFmt['Attach:'] = "<a class='attachlink' href='\$LinkUrl'>\$LinkText</a>";

%apply=item id=Link Upload Create Fmt?%$LinkUploadCreateFmt

The format of the upload link displayed when an attachment not present. Can be changed with such a line in config.php:

$LinkUploadCreateFmt = "<a class='createlinktext' href='\$LinkUpload'>\$LinkText</a>
<a class='createlink' href='\$LinkUpload'>&nbsp;&Delta;</a>";

%apply=item id=Upload Prefix Fmt?%$UploadPrefixFmt

Sets the prefix for uploaded files to allow attachments to be organized other than by groups. Defaults to '/$Group' (uploads are organized per-group), but can be set to other values for sitewide or per-page attachments.

    $UploadPrefixFmt = '/$Group/$Name';    # per-page attachments
    $UploadPrefixFmt = '';                 # sitewide attachments

It is recommended to have the $UploadPrefixFmt variable defined in config.php, the same for all pages in the wiki, and not in group/page local configuration files. Otherwise you will be unable to link to attachments in other wikigroups.

%apply=item id=Enable Direct Download?%$EnableDirectDownload

When set to 1 (the default), links to attachments bypass Pm Wiki and come directly from the webserver. Setting $EnableDirectDownload=0; causes requests for attachments to be obtained via ?action=download. This allows Pm Wiki to protect attachments using a page's read permissions, but also increases the load on the server. Don't forget to protect your directory /uploads/ with a .htaccess file (Order Deny,Allow / Deny from all).

%apply=item id=Enable Upload Group Auth?%$EnableUploadGroupAuth

Set $EnableUploadGroupAuth = 1; to authenticate downloads with the group password. This could be used together with $EnableDirectDownload = 0;. Note: $EnableUploadGroupAuth should not be enabled if your wiki uses per-page attachments.

%apply=item id=Enable Upload Versions?%$EnableUploadVersions

When set to 1 (default is 0), uploading a file to a location where a file of the same name already exists causes the old version to be renamed to file.ext,timestamp (instead of being overwritten). timestamp is a Unix-style timestamp.

%apply=item id=Enable Upload Overwrite?%$EnableUploadOverwrite

When set to 1 (the default), determines if overwriting previously uploaded files is allowed.

%apply=item id=Upload Name Chars?%$UploadNameChars

The set of characters allowed in upload names. Defaults to "-\w. ", which means alphanumerics, hyphens, underscores, dots, and spaces can be used in upload names, and everything else will be stripped. It is only possible to enable characters that exist in the code page (charater set) of the wiki, see Wikipedia:Code page.

$UploadNameChars = "-\\w."; # allow dash, letters, digits, underscore, and dots (no spaces)

$UploadNameChars = "-\\w. \\x80-\\xff"; # allow Unicode

Note: Not all characters can be used in file names, because of various limitations in protocols or operating systems, file systems and server software, or conflict with Pm Wiki markup:

• +?:@#%!=/ have special meanings in URL addresses,
• |\^`[]?:@#%/ may be impossible to save on some systems,
• <>"|\^`(){}[]#% may conflict with Pm Wiki markups,

so it is strongly recommended to only enable those if you know what you're doing.

%apply=item id=Make Upload Name Patterns?%$MakeUploadNamePatterns

An array of regular expression replacements that is used to normalize the filename of an attached file. First, everything but $UploadNameChars will be stripped, then the file extension will be converted to lowercase. Administrators can override these replacements with a custom definition (the full array needs to be defined). Currently the default sequence is:

    $MakeUploadNamePatterns = array(
    "/[^$UploadNameChars]/" => '', # strip all not-allowed characters
    '/\\.[^.]*$/' => 'cb_tolower', # convert extension to lowercase (callback function)
    '/^[^[:alnum:]_]+/' => '',     # strip initial spaces, dashes, dots
    '/[^[:alnum:]_]+$/' => ''))    # strip trailing spaces, dashes, dots

%apply=item id=Upload Dir Quota?%$UploadDirQuota

Overall size limit for all uploads.

   $UploadDirQuota = 100*1024;         # limit uploads to 100KiB
   $UploadDirQuota = 1000*1024;        # limit uploads to 1000KiB
   $UploadDirQuota = 1024*1024;        # limit uploads to 1MiB
   $UploadDirQuota = 25*1024*1024;     # limit uploads to 25MiB
   $UploadDirQuota = 2*1024*1024*1024; # limit uploads to 2GiB

%apply=item id=Upload Prefix Quota?%$UploadPrefixQuota

Overall size limit for one directory containing uploads. This directory is usually Group Name? (one for every Wiki Group), or uploads/Page Name? (one for every page), depending on the variable $UploadPrefixFmt.

%apply=item id=Upload Max Size?%$UploadMaxSize

Maximum size for uploading files, 50000 octets (bytes) by default.

%apply=item id=Upload Ext Size?%$UploadExtSize

Maximum size per extension, overriding the default in $UploadMaxSize.

   $UploadExtSize['zip'] = 2*1024*1024; # allow up to 2MiB for zip files

%apply=item id=Upload Redirect Function?%$UploadRedirectFunction

The function to be called after a file was posted. By default the "Redirect" function is called with arguments $pagename and the URL of the ?action=upload page (with additional information if the upload was successful or why it wasn't, and if the file was renamed). An add-on may define its own function, for example an AJAX upload may only return some variable back to the browser.