Installation should be done using Composer:
composer require silverstripe/userforms
After installation, make sure you rebuild your database through dev/build.
You should see a new page type in the CMS called 'User Defined Form'. This has a new 'Form' tab which has your form builder.
The module allows adding a "File Upload Field" to a form. The field enables users of this form to upload files to the website's assets so they can be viewed later by CMS authors. Small files are also attached to the (optional) email notifications to any configured recipients.
Allowed file extensions can be configured globally through File.allowed_extensions,
and default to a safe set of files (e.g. disallowing *.php uploads).
You can define further exclusions through the EditableFileField.allowed_extensions_blacklist
configuration setting.
The allowed upload size can be set in the CMS as long as it doesn't exceed the PHP configuration
for this website (the smaller value of upload_max_filesize or post_max_size).
By adding a File Upload Field to your user form you can allow your website users to upload files, which will be stored in a user-defined folder in your SilverStripe system. You can access these files via the "Submissions" tab, or from the "Files" area in the admin interface.
Please be aware that the responsibility of choosing a folder for files to be uploaded into is that of the CMS user. You can set the necessary "can view" permissions for the folder you create and/or choose via the "Files" section, then select that folder in the settings for the File Upload Field in your form.
If you choose a folder that anyone can view you may be exposing files uploaded via your form to the public, as well as anyone with access to the CMS.
You should think carefully about the use case for file uploads. Unauthorised viewing of files might be desired, e.g. submissions for public competitions. In other cases, submissions could be expected to contain private data.
If you want to use custom email templates set the following config option.
SilverStripe\UserForms\Model\UserDefinedForm:
email_template_directory: mysite/templates/custom_userforms_emails/Any SilverStripe templates placed in your email_template_directory directory will be available for use with submission emails.
If you want to change the button text when using the Multi-Step/Page Break feature, simply add the following to your config.yml:
SilverStripe\UserForms\Form\UserForm:
button_text: 'Your Text Here'