Invitation Codes: Gravityforms Add-on

This plugin is created to enable WordPress site owners to specify a custom invitation code to be used with Gravity Forms.
Once an invitation code is specified on a form, the user can’t submit that form until that invitation code is entered in
the field during the form submission. This plugin can be combined with the Gravity Forms User Registration Add-On to make
sure that only people with a correct invitation code can register on your website.

1. Upload the plugin folder to your /wp-content/plugins/ folder.
2. Go to the Plugins page and activate the plugin.
3. Create a GravityForm form and go the edit page.
4. Within the Advanced Fields section in the editor, select “Invitation Code”.
5. In the General tab of the Field Settings fill in the Invitation Code you want.
6. In the Appearance tab of the Field Settings, you can specify the “Custom Validation Message”. This message will be
   shown to the user when a wrong invitation code is submitted.

1. 

   General tab of the Invitation Code field in the form editor.

2. 

   General tab of the Invitation Code field with a filled in Invitation Code, and checked option regarding case-sensitive invitation codes.

3. 

   Appearance tab of the Invitation Code field with a custom validation message.

4. 

   Form preview with the Invitation Code field with an incorrect input.

1.5

• New: Added support for multi-page Gravity Forms forms. Thanks @ianmac2 for reporting this bug.
• Fixed: Validation now works correctly with comma-separated invitation codes entered in the field settings.
• Tested: Confirmed compatibility with the latest versions of WordPress and Gravity Forms.

1.4

• Fixed: Changed the invitation codes fields to a text area instead of a simple text field.
• Fixed: Run the Plugin Check (PCP) on the plugin and solved the raised issues

1.3

• Fixed: Removed the plugin dependency of GravityForms. WP.org reject the plugin because GF can’t be found on WP.org

1.2

• New: The plugin requires now GravityForms to be installed to activated
• New: The limit of 200 invitation codes has been imposed in the form editor.
• New: Placeholder support is added to the field.
• Fixed: Corrected typos and did some minor reformatting for the code.

1.1

• New: Invitation code can now be a list of comma-separated codes instead of a single code.
• New: User can make invitation codes input case-sensitive; default is case-insensitive.
• Fixed: The invitation code field can now be populated dynamically just like other GF fields.
• Fixed: The Javascript part is rewritten.

1.0

• Plugin released.