Krzysztof Busłowicz

[This plugin is outdated and no longer maintained. Please use the much easier Honeypot for CF7 instead.]
Adds double opt-in functionality to CF7 forms submissions. Double opt-in means that form submitters have to confirm their identity by their email account. The plugin is ready for translation.
Double opt-in dependencies
This plugin is an add-on to <a href="https://wordpress.org/plugins/contact-form-7/" rel="ugc">Contact Form 7</a> plugin by Takayuki Miyoshi. 
Functionality of this plugin also depend on installing and activating one of the plugins, which saves Contact Form 7 submissions to WordPress database. At the time, compatible plugins are:
<ul>
<li><a href="https://wordpress.org/plugins/flamingo/" rel="ugc">Flamingo</a> by Takayuki Miyoshi</li>
<li><a href="https://wordpress.org/plugins/contact-form-cfdb7/" rel="ugc">Contact Form 7 Database Addon – CFDB7</a> by Arshid</li>
</ul>
Note that BOTH Contact Form 7 and one of the listed above plugins are required for double opt-in functionality to work.
Help and Docs
The first and most complete documentation is located on <a href="https://sirta.pl/double-opt-in-for-contact-form-7-documentation/" rel="nofollow ugc">plugin official page</a>. 
If you’re a developer, feel free to take a look at <a href="https://github.com/elkurczako/Double-Opt-in-for-CF7" rel="nofollow ugc">the plugin page on GitHub repository</a>. 
You can also seek for help on WordPress support forum.
Plugin features
<ul>
<li>One click conversion of existing CF7 forms into double opt-in enabled forms.</li>
<li>URL parameters encryption to make confirmation links safe.</li>
<li>HTML email templates with mail tags similar to used in CF7 plugin. If you know how to configure CF7 emails, double opt-in will be easy.</li>
<li>Automatic creation of the “opt-in” page to process confirmed submissions.</li>
<li>Adding a CSV file attachment to final submission email containing form data.</li>
<li>Adding file attachment to final confirmation email sent to the submitter.</li>
<li>Setting expiration time for submissions to be confirmed.</li>
<li>Ability to manually confirm forms. That can be useful if your submitter enters an invalid email address, and you are sure you want to send their submission anyway.</li>
</ul>
Additional enhancements
Apart from its main feature, Double Opt-in for CF7 adds some functions you may find nice and useful:
<ul>
<li>Custom, accessible file upload inputs for your forms which look better, can be CSS styled and allow easy selecting and deselecting files to upload. This works for every CF7 form, not only double opt-in enabled.</li>
<li>Custom, more specific validation errors for radio buttons and checkboxes for improved accessibility.</li>
<li>Option to change CSV separator when exporting submissions from Flamingo plugin. It also adds BOM to CSV exports, allowing them to be properly opened in MS Excel. </li>
<li>Additional column on Flamingo Inbound Messages screen indicating if submission is complete or still waiting for being confirmed by sender.</li>
</ul>
What is double opt-in and why use it:
Double opt-in is the safe way of receiving site visitor’s submitted input. Used with contact forms or online questionnaires or with user registration, it helps to reduce spam submissions. With GDPR laws, double opt-in is a strongly recommended way of getting user data. Because submitters have to confirm their identity from their email address, you can reduce risk of processing personal data without permission. Double – means here that user submitting the data has to give consent by checking checkbox option and additionally confirm their email-address. 
Do not forget to set acceptance field in your CF7 form if GDPR is in concern!
How Double opt-in form works:
When someone fills and submits a form with double opt-in functionality, the first CF7 email goes back to THEM. There is a confirmation link in that email, which the submitter has to click on or paste in their web browser. The link has two encrypted parameters: submission serial number and submitter email address. The page with “opt-in” slug validates the parameters with submission stored in WordPress database and initiates sending of final emails to recipient set in “All Opt-In Forms” settings. If validation fails or when submission has expired, no emails are sent. If there are no specified parameters in the URL, visitors of the “opt-in” page are redirected to “404” page.
Plugin translation
Double Opt-In can be easily translated. It is released with the translation to Polish language.

Double Opt-in for CF7

This plugin adds a double opt-in functionality to CF7 forms.

Takayuki Miyoshi

Umar Draz

Rock Lobster Inc.

Bogo is a straight-forward multilingual plugin for WordPress.
The core of WordPress itself has the built-in localization capability so you can use the dashboard and theme in one language other than English. Bogo expands this capability to let you easily build a multilingual blog on a single WordPress install.
Here are some technical details for those interested. Bogo plugin assigns <a href="https://wordpress.org/support/article/multilingual-wordpress/#different-types-of-multilingual-plugins" rel="ugc">one language per post</a>. It plays nice with WordPress – Bogo does not create any additional custom table on your database, unlike some other plugins in this category. This design makes Bogo a solid, reliable and conflict-free multilingual plugin.
<h4>Getting started with Bogo</h4>
<ol>
<li>
Install language packs
First, install language packs for languages you use on the site. You can view and install language packs in the Language Packs screen (Languages > Language Packs).
</li>
<li>
Select your language for admin screen
Bogo lets each logged-in user select a language for their admin screen UI. Select a language from the menu on the <a href="https://wordpress.org/support/article/administration-screens/#toolbar-keeping-it-all-together" rel="ugc">Toolbar</a>, or from the menu in the Profile screen (Users > Your Profile) if the Toolbar is invisible.
</li>
<li>
Translate your posts and pages
To create a translation post, go to the editor screen for the original post and find the Language box. Bogo does only make a copy of the post; translating the copied post is your task.
</li>
<li>
Add language switcher widgets
It would be useful for site visitors if you have a language switcher on your site. Bogo provides the Language Switcher widget in the Widgets screen (Appearance > Widgets).
You can also use the <code>[bogo]</code> shortcode to put a language switcher inside a post content. If you want to use this shortcode in your theme’s template files, embed the following code into the template:
<pre><code><?php echo do_shortcode( '[bogo]' ); ?>
</code></pre>
</li>
</ol>
<h4>Privacy notices</h4>
With the default configuration, this plugin, in itself, does not:
<ul>
<li>track users by stealth;</li>
<li>write any user personal data to the database;</li>
<li>send any data to external servers;</li>
<li>use cookies.</li>
</ul>

Bogo


There are some functionalities needed that should be in the core like change the post language, or linking to another post.



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A straight-forward multilingual plugin. No more double-digit custom DB tables or hidden HTML comments that could cause you headaches later on.

Double Opt-in for CF7 vs Bogo