Campaign Monitor Changelog

4.0.0 | 2023-12-20

  • Fixed the PHP 8.2 creation of dynamic property deprecation notice that occurs on the settings page.
  • Added support for async (background) feed processing to improve form submission performance.

3.9 | 2020-09-21

  • Added support for Gravity Forms 2.5.

3.8 | 2020-03-10

  • Added support for feed duplication.
  • Added translations for Hebrew, Hindi, Japanese, and Turkish.
  • Updated the API Key setting description.
  • Fixed an issue where the Campaign Monitor API could ignore values passed from Multi Select fields.

3.7 | 2018-04-02

  • Added security enhancements.
  • Added logging statement.
  • Added License GPL to plugin header.
  • Updated Plugin URI and Author URI to use https.

3.6 | 2018-01-05

  • Fixed the string replacement for the Contact List tooltip.

3.5 | 2017-05-23

  • Fixed a fatal error which could occur with PHP 7.1 when preparing the checkbox field value.
  • Fixed a fatal error with PHP < 5.5.
  • Fixed strings for translations.
  • Updated API library to work with PHP 7+.

3.4 | 2015-08-07

  • Added form specific version of the gform_campaignmonitor_override_blank_custom_fields filter.
  • Added form specific version of the gform_campaignmonitor_override_subscriber filter.
  • Added form and field specific versions of the gform_campaignmonitor_field_value filter.
  • Updated minimum Gravity Forms version to 1.9.3.
  • Updated 'Opt-In Condition' setting label to 'Conditional Logic'.
  • Updated feed processing to use get_field_value() when retrieving mapped field values, enabling support for GF_Field::get_value_export with GF and later.
  • Updated 'API Client ID' label on plugin settings page to 'Client API Key' so it's consistent with the wording used by Campaign Monitor.
  • Fixed an issue with the feed list page if the API key not valid.
  • Fixed a PHP notice if no clients are configured in the Campaign Monitor account.
  • Fixed an issue with the upgrade routine which caused it run even if a pre-framework version hadn't been installed.

3.3 | 2015-04-20

  • Added support for the middle name input when preparing Name field values.
  • Updated logging statements.
  • Fixed a low severity security vulnerability in the admin area which could be exploited by authenticated users with form administration permissions.
  • Fixed issues with multi-select fields not sending data in the expected format
  • Fixed issue where client list was displayed even when API Client ID was entered.

3.2 | 2014-11-21

  • Added gform_campaignmonitor_override_subscriber filter to allow users to modify or add subscriber parameters sent to the Campaign Monitor API.
  • Fixed issue where email address mapping was not being required.
  • Fixed issue during upgrade that prevented data from being transfered to new structure under certain situations.

3.1 | 2014-11-04

  • Fixed issue during upgrade that prevented data from being transfered to new structure under certain situations.

3.0 | 2014-10-27

  • Added Add-on Framework integration.
  • Added function gf_campaignmonitor to easily get a Campaign Monitor instance.
  • Added missing gform_campaignmonitor_override_blank_custom_fields hook.
  • Added gform_campaignmonitor_field_value filter to allow add-ons to modify values sent to the Campaign Monitor API.
  • Added text domain/path to header.
  • Updated Campaign Monitor API to version 4.0.0 to fix some conflicts with other active plugins using Campaign Monitor.
  • Updated required version of Gravity Forms to 1.8.17.
  • Updated POT file.
  • Fixed notices.


  • Fixed bug that threw a javascript error in TruncateMiddle function when text was undefined (this could happen in some instances when a label was not specified for a field).
  • Fixed headers already sent issue by removing blank lines at the end of files.


  • Updated Campaign Monitor API to version 2.5.2.
  • Updated "Resubscribe" UI to use a label so clicking the text also checks the corresponding checkbox.

2.1 | 2013-02-08

  • Updated AJAX URL to resolve conflict when site is running under SSL.
  • Updated marking the entry as subscribed to only be when the optin condition is met.
  • Fixed issue with special characters in Campaign Monitor field names causing items to not map.
  • Removed extraneous call to non-existant function: $api->listMergeVars().
  • Fixed issue where serialisation function not checked if already exists.

2.0 | 2012-06-27

  • Added logging support.
  • Added support for Manage WP.
  • Added new conditional logic options (greater than, less than, contains starts with, ends with) and support for other conditional fields.
  • Fixed notices.
  • Fixed issue where product name was overriding full name for subscribers.
  • Added integration with PayPal so that subscribers can be added only when payment is received.
  • Fixed localization issue with some strings.
  • Fixed issue where RG_CURRENT_PAGE constant was not available when Gravity Forms was deactivated.

1.9 | 2011-11-01

  • Fixed issue with broken function_exist conditional in API.


  • Wrapped all API classes in class_exists() conditional for compatibility with other plugins using the same API.

1.8 | 2011-06-23

  • Updated API wrapper so that it is compatible with v.3 of the Create Send API.
  • Removed blank strings from POT file.

1.7 | 2011-06-21

  • Added ability to map checkbox fields.
  • Removing price from Product fields (drop down and radio field types), so that only the Product name is sent to Campaign Monitor.
  • Cleaned up debug Notice messages.

1.6 | 2011-04-25

  • Fixed issue when using condition on a field with multiple single quote in its label.

1.5 | 2011-04-13

  • Fixed issue when creating a feed using forms with HTML markup in field labels.
  • Added logic to prevent Campaign Monitor API classes from being loaded if it is already loaded by another plugin.
  • Third Party Modification: Check if Services_JSON class exists (line 3, apiclassesserialisation.php).
  • Added "Cancel" button to Edit page and updated "Save" and "Update" button verbiage.

1.4 | 2010-12-15

  • Upgraded to Campaign Monitor API v3.
  • Added API Client ID option in settings to limit the Add-On to the specified client.

1.3 | 2010-12-15

  • Fixed issue with name fields (when cofigured with "Simple" type) from being exported.

1.2 | 2010-12-15

  • Fixed automatic upgrade issue with WP 3.0.

1.1 | 2010-12-15

  • Fixed issue with client drop down when there was only one client configured in Campaign Monitor.

1.0 | 2010-12-15

  • Updated POT file.

0.2 | 2010-12-15

  • Adding Campaign Monitor capabilities to admin role upon plugin activation.
  • Fixed bug with condition when drop down item did not have the value property set.

0.1 | 2010-12-15

  • Initial.