See also: Uploads, Uploads admin.

$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).

$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.

$UploadUrlFmt

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

$IMapLinkFmt['Attach:']

$LinkUploadCreateFmt

The format of the upload link displayed when an attachment not present. Defaults to

      <a class='createlinktext' href='\$LinkUpload'>\$LinkText</a>
      <a class='createlink' href='\$LinkUpload'> Δ</a>");

$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.

$EnableDirectDownload

When set to 1 (the default), links to attachments bypass PmWiki and come directly from the webserver. Setting $EnableDirectDownload=0; causes requests for attachments to be obtained via ?action=download. This allows PmWiki 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).

$EnableUploadGroupAuth

Set $EnableUploadGroupAuth = 1; to authenticate downloads with the group password. This could be used together with $EnableDirectDownload = 0;.

$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.

$EnableUploadOverwrite

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

$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.

$UploadNameChars = "-\\w. !"; # allow dash, letters, digits, dots, spaces and exclamations

$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 PmWiki markup:

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

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

$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).

$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

$UploadPrefixQuota

Overall size limit for one directory containing uploads. This directory is usually uploads/GroupName (one for every WikiGroup), or uploads/Group/PageName (one for every page), depending on the variable $UploadPrefixFmt.

$UploadMaxSize

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

$UploadExtSize

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

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