Duplicate Killer – Prevent Duplicate Form Submissions
| 开发者 | wpnia |
|---|---|
| 更新时间 | 2026年2月18日 01:27 |
| 捐献地址: | 去捐款 |
| PHP版本: | 5.6.20 及以上 |
| WordPress版本: | 6.9 |
| 版权: | GPLv2 or later |
| 版权网址: | 版权信息 |
详情介绍:
Duplicate Killer – Block Duplicate Form Submissions in WordPress.
If your forms receive the same email address multiple times, fake leads, or repeated submissions, this plugin blocks them instantly.
Choose which fields must be unique (email, phone, text) and block duplicate entries automatically — without changing your form design or user experience.
Duplicate Killer works silently in the background and integrates seamlessly with popular WordPress form plugins and page builders.
Free: In the free version, duplicate protection can be enabled for one form per supported plugin.
PRO: Duplicate Killer PRO enables multi-form protection with individual rules and messages per form.
安装:
- Install Duplicate Killer from the WordPress Plugins screen or upload it to
/wp-content/plugins/. - Activate the plugin from the Plugins menu.
- Open Duplicate Killer from your WordPress admin dashboard.
- Select your form plugin and choose which fields must be unique.
屏幕截图:
常见问题:
Does this plugin block bots or spam?
Duplicate Killer focuses on preventing duplicate form submissions and entries. It works alongside spam or CAPTCHA plugins and does not replace them.
Will this slow down my site?
No. Duplicate Killer performs lightweight database checks only on form submission and has no impact on frontend performance.
Why should I use Duplicate Killer?
Duplicate Killer prevents duplicate emails and repeated form submissions, helping you keep your leads and contact data clean.
How does Duplicate Killer work?
When a form is submitted, selected field values are stored in the database. If the same value is submitted again, the submission is blocked and a validation message is shown.
Can multiple users submit the same value?
Yes. In the PRO version, you can enable “Unique entries per user”, allowing multiple users to submit the same value while blocking repeat submissions from the same user.
Does it affect form design or styling?
No. Duplicate Killer works in the background and does not change your form appearance.
Does it work with Elementor Forms?
Yes. Duplicate Killer fully supports Elementor Forms.
Does this plugin work with existing spam protection plugins?
Yes. Duplicate Killer works alongside spam and CAPTCHA plugins and focuses only on preventing duplicate form submissions.
更新日志:
1.5.0
- New milestone system: track total duplicates blocked.
- Admin insights: see how many duplicates Duplicate Killer stopped.
- Smart review prompts at key protection milestones.
- Internal improvements and stability fixes.
- Improved security and data validation.
- Better compatibility with latest WordPress versions.
- Cleaner and more stable file handling for uploaded files.
- Improved admin performance and script loading.
- Translation system aligned with WordPress standards.
- General code cleanup and stability improvements.
- Updated: Free vs PRO structure updated to reflect the long-term direction of the plugin.
- Added: Visual guidance in the admin area for multi-form protection.
- Improved: Minor improvements to cookie-based duplicate detection.
- New: Full Ninja Forms support – block duplicate submissions before entries are saved.
- Major upgrade: Cookie engine fully rewritten for better performance and reliability.
- Improved compatibility with cache plugins and strict Content Security Policies (CSP).
- Smarter cookie-based uniqueness logic, applied only when enabled per form.
- Internal optimizations preparing support for additional form plugins.
- New: Formidable Forms support – stop duplicate form submissions by email or other fields.
- Prevent duplicate entries by email, phone, or text fields in Formidable Forms.
- Improved compatibility and stability across supported form plugins.
- New feature: Duplicate protection for Elementor Forms
- Bug fix: Undefined array key Forminator
- Bug: Problem with table creation
- Support Number field on Forminator
- Tested up to WordPress 6.9
- Feature: Added support for forms built with Breakdance Page Builder.
- Feature: Automatically store uploaded files from the form (CF7) on your server
- Tested up to 6.8.1
- Feature: Restrict form entries based on IP address
- Feature: Store CF7 files submitted
- Bug: Problem with table creation
- Feature: Add form date submission
- Feature: Store CF7/Forminator/WPForms submissions to your WordPress database
- Tested up to 6.7.2 Wordpress
- Bug: Fixed - Custom HTML in CF7 form – issue with detection
- Bug: Fixed only first 3 forms are showing in the “WPForms forms list”
- Bug: Fixed style sheet.
- Bug: Prevent empty values from being detected as duplicate entries.
- Interface to manage the saved values in your WordPress database.
- Duplicate Killer will prevent the entries from being added into CFDB7(Contact Form 7 Database Addon) plugin.
- Tested up to 6.4.1 Wordpress'
- Fixed PHP Warning Undefined array key at CF7 function
- Tested up to 6.3.1 Wordpress'
- Tested up to 6.1.1 Wordpress'
- Fix bug at feature 'Unique entries per user'
- New feature - Unique entries per user
- New style navigation for better UX
- First public release