Title: Gravity Forms Duplicate Prevention Author: Buckeye Interactive Published: February 8, 2013 Last modified: March 20, 2016 --- Search plugins This plugin **hasn’t been tested with the latest 3 major releases of WordPress**. It may no longer be maintained or supported and may have compatibility issues when used with more recent versions of WordPress. ![](https://s.w.org/plugins/geopattern-icon/gravity-forms-duplicate-prevention.svg) # Gravity Forms Duplicate Prevention By [Buckeye Interactive](https://profiles.wordpress.org/buckeyeinteractive/) [Download](https://downloads.wordpress.org/plugin/gravity-forms-duplicate-prevention.0.1.5.zip) * [Details](https://scn.wordpress.org/plugins/gravity-forms-duplicate-prevention/#description) * [Reviews](https://scn.wordpress.org/plugins/gravity-forms-duplicate-prevention/#reviews) * [Installation](https://scn.wordpress.org/plugins/gravity-forms-duplicate-prevention/#installation) * [Development](https://scn.wordpress.org/plugins/gravity-forms-duplicate-prevention/#developers) [Support](https://wordpress.org/support/plugin/gravity-forms-duplicate-prevention/) ## Description This plugin adds silent duplicate detection to the popular [Gravity Forms](http://www.gravityforms.com/) WordPress plugin. The goal is to prevent Gravity Forms from creating multiple entries when an impatient user double-, triple, or full-on secret-combo-move-clicks his/ her mouse when submitting a form. No modifications to your forms is necessary, it just works. #### How does it work? The plugin prevents duplicate submissions in two ways: first, a small bit of JavaScript is loaded into the page that disables the submit button(s) on form submit. Second, the plugin creates a cryptographic hash of the form data upon submission. This unique hash is compared to a hash stored in a PHP session (if available) and, if a matching hash is found, the form data is altered to simulate a failing honeypot condition. Like with all failed honeypots, Gravity Forms will skip saving the data or sending any notifications but the form will appear (to the user) to have been submitted successfully. Plugin development can be tracked on the project’s Github Page: [https://github.com/buckii/gravity-forms-duplicate-prevention](https://github.com/buckii/gravity-forms-duplicate-prevention) ## Installation 1. Upload the gravity-forms-duplicate-prevention plugin to your WordPress plugins directory 2. Activate the plugin ## FAQ What versions of Gravity Forms has this plugin been tested against? The plugin was developed against Gravity Forms version 1.6.11, the most current at the time. If you find issues with newer versions please file a bug report at [https://github.com/buckii/gravity-forms-duplicate-prevention](https://github.com/buckii/gravity-forms-duplicate-prevention). Can I prevent loading the client-side scripting? Yes! The JavaScript file is a very simple jQuery-powered event listener. If you’d prefer to move it to your own script file (or exclude it entirely), you can add the following to your theme’s functions.php: ``` add_filter( 'gform_duplicate_prevention_load_script', '__return_false' ); ``` I find your lack of paranoia disturbing. What if your plugin accidentally honeypots a valid submission? We’d by lying if I said that didn’t happen to us in testing. As a result we’ve ensured that Gravity Forms Duplicate Prevention will log the raw HTTP POST data upon detection of a duplicate entry (sent through PHP’s system logger using [`error_log`](http://php.net/manual/en/function.error-log.php)). If something goes wrong your data should be recoverable. As of version 0.1.1 you can also latch onto the `gform_duplicate_prevention_duplicate_entry` action hook if you want to do anything else with the duplicate data; Your function will receive the `$validation_result` array as it was passed to the plugin by Gravity Forms’ [`gform_validation`](http://www.gravityhelp.com/documentation/page/Gform_validation) filter. **Example:** ``` function log_duplicate_entries( $validation_result ) { // send an email, log it, and/or add points to the user's double-click combo score here } add_action( 'gform_duplicate_prevention_duplicate_entry', 'log_duplicate_enties' ); ``` How can I contribute to the further development of this plugin? The plugin’s source is hosted on Github: [https://github.com/buckii/gravity-forms-duplicate-prevention](https://github.com/buckii/gravity-forms-duplicate-prevention). If you’d like to contribute, please feel free to send us a pull request or contact us there. ## Reviews ![](https://secure.gravatar.com/avatar/9d2d55acbaebd1c0bf3d94c778d235b6aa656b1618d781d1808a3ed111e25ff3? s=60&d=retro&r=g) ### 󠀁[Still works](https://wordpress.org/support/topic/still-works-119/)󠁿 [dfterry](https://profiles.wordpress.org/dfterry/) October 16, 2017 Still works, but I don’t like it filling up error logs with messages. Should be sending that somewhere else. ![](https://secure.gravatar.com/avatar/2c4d57c67039beceb6ae2c882f6dd6aab0accade24d2b4dd92239083c782fb5f? s=60&d=retro&r=g) ### 󠀁[Does not work anymore but…](https://wordpress.org/support/topic/does-not-work-anymore-but/)󠁿 [termel](https://profiles.wordpress.org/munger41/) September 19, 2017 2 replies This one works now : https://wordpress.org/plugins/gf-prevent-duplicates/ Thanks anyway ![](https://secure.gravatar.com/avatar/a27da94b2d485330a66db8664e788d0b007ae5a54eda05f5543a23ca773a9106? s=60&d=retro&r=g) ### 󠀁[working nice!](https://wordpress.org/support/topic/working-nice-11/)󠁿 [parksijoong](https://profiles.wordpress.org/parksijoong/) July 1, 2017 Thank you. it is working nice ![](https://secure.gravatar.com/avatar/26e7391fff6b02acc3922e24b64e2e417de9685473eb6fe2d271478a50f03844? s=60&d=retro&r=g) ### 󠀁[Perfect](https://wordpress.org/support/topic/perfect-3555/)󠁿 [tamias-airlab](https://profiles.wordpress.org/tamias-airlab/) January 31, 2017 Work as expected. Thanks a lot ! Mat ![](https://secure.gravatar.com/avatar/134116e016afe89d04632239206568a37f9e80a839e692757373478592548ce1? s=60&d=retro&r=g) ### 󠀁[Top notch, thank you!](https://wordpress.org/support/topic/top-notch-thank-you/)󠁿 [joleksow](https://profiles.wordpress.org/joleksow/) September 3, 2016 This is a great plugin that does exactly what it claims — nothing more, nothing less. The code is really well documented and I appreciate the inclusion of filters in case site owners need to make slight modifications. Really great work! ![](https://secure.gravatar.com/avatar/2806ab557e2a153347da9fb0e2dbe58ab47ce10bb60ccac71193e8ed67349a23? s=60&d=retro&r=g) ### 󠀁[Works perfect!](https://wordpress.org/support/topic/works-perfect-291/)󠁿 [edujugon](https://profiles.wordpress.org/edujugon/) September 3, 2016 Great Job, It works 100%. [ Read all 12 reviews ](https://wordpress.org/support/plugin/gravity-forms-duplicate-prevention/reviews/) ## Contributors & Developers “Gravity Forms Duplicate Prevention” is open source software. The following people have contributed to this plugin. Contributors * [ Buckeye Interactive ](https://profiles.wordpress.org/buckeyeinteractive/) * [ Steve Grunwell ](https://profiles.wordpress.org/stevegrunwell/) [Translate “Gravity Forms Duplicate Prevention” into your language.](https://translate.wordpress.org/projects/wp-plugins/gravity-forms-duplicate-prevention) ### Interested in development? [Browse the code](https://plugins.trac.wordpress.org/browser/gravity-forms-duplicate-prevention/), check out the [SVN repository](https://plugins.svn.wordpress.org/gravity-forms-duplicate-prevention/), or subscribe to the [development log](https://plugins.trac.wordpress.org/log/gravity-forms-duplicate-prevention/) by [RSS](https://plugins.trac.wordpress.org/log/gravity-forms-duplicate-prevention/?limit=100&mode=stop_on_copy&format=rss). ## Changelog #### 0.1.5 * Add credit card number obfuscation (thanks Justin Foell) and `gform_duplicate_prevention_execute` filter (thanks Mat Gargano). #### 0.1.4 * Integrate Gravity Forms logging support (thanks Justin Foell). #### 0.1.3 * Limit the scope of the JavaScript button disabling to submit buttons within `. gform_wrapper` elements (thanks to Mike Yott for catching this!) #### 0.1.2 * Fixed strict notices regarding the plugin version #### 0.1.1 * Added `gform_duplicate_prevention_duplicate_entry` action hook that fires when a duplicate entry is detected * Documentation updates #### 0.1 * First public version of the plugin ## Meta * Version **0.1.5** * Last updated **10 years ago** * Active installations **400+** * WordPress version ** 3.5 or higher ** * Tested up to **4.4.34** * Language * [English (US)](https://wordpress.org/plugins/gravity-forms-duplicate-prevention/) * Tags * [forms](https://scn.wordpress.org/plugins/tags/forms/)[gravity forms](https://scn.wordpress.org/plugins/tags/gravity-forms/) * [Advanced View](https://scn.wordpress.org/plugins/gravity-forms-duplicate-prevention/advanced/) ## Ratings 4.6 out of 5 stars. * [ 10 5-star reviews ](https://wordpress.org/support/plugin/gravity-forms-duplicate-prevention/reviews/?filter=5) * [ 1 4-star review ](https://wordpress.org/support/plugin/gravity-forms-duplicate-prevention/reviews/?filter=4) * [ 0 3-star reviews ](https://wordpress.org/support/plugin/gravity-forms-duplicate-prevention/reviews/?filter=3) * [ 0 2-star reviews ](https://wordpress.org/support/plugin/gravity-forms-duplicate-prevention/reviews/?filter=2) * [ 1 1-star review ](https://wordpress.org/support/plugin/gravity-forms-duplicate-prevention/reviews/?filter=1) [Your review](https://wordpress.org/support/plugin/gravity-forms-duplicate-prevention/reviews/#new-post) [See all reviews](https://wordpress.org/support/plugin/gravity-forms-duplicate-prevention/reviews/) ## Contributors * [ Buckeye Interactive ](https://profiles.wordpress.org/buckeyeinteractive/) * [ Steve Grunwell ](https://profiles.wordpress.org/stevegrunwell/) ## Support Got something to say? Need help? [View support forum](https://wordpress.org/support/plugin/gravity-forms-duplicate-prevention/)