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[This plugin is outdated and no longer maintained.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.

TIV.NET INC.

Gregory Karpinsky (@tivnet)

Alex Gor

WPGlobus is a family of WordPress plugins assisting you in translating and maintaining bilingual/multilingual WordPress blogs and sites.
<h4>Quick Start Video</h4>
<iframe loading="lazy" class="youtube-player" width="750" height="422" src="https://www.youtube.com/embed/zoTWY9JrXLs?version=3&rel=1&showsearch=0&showinfo=1&iv_load_policy=1&fs=1&hl=en-US&autohide=2&wmode=transparent" allowfullscreen="true" style="border:0;" sandbox="allow-scripts allow-same-origin allow-popups allow-presentation allow-popups-to-escape-sandbox"></iframe>
Please also read the <a href="https://wpglobus.com/quick-start/" rel="nofollow ugc">Quick Start Guide</a>.
<h4>Important Notes: please read before using WPGlobus!</h4>
<ul>
<li>NO AUTOMATIC TRANSLATION:
<ul>
<li>WPGlobus does NOT translate texts automatically! You will translate texts manually.</li>
</ul>
</li>
<li>PAGE BUILDERS / COMPOSERS:
<ul>
<li>WPGlobus supports blocks (“Gutenberg”) and WPBakery Page Builder. Other builders, such as “Page Builder by SiteOrigin”, “Beaver Builder”, Fusion (“Avada”), Elegant (“Divi”), Elementor, etc. have limited or no support.</li>
</ul>
</li>
<li>IF YOU UNINSTALL, YOU LOSE TRANSLATIONS:
<ul>
<li>WPGlobus stores all translations using a special format: <code>{:en}English{:}{:fr}French{:}{:es}Spanish{:}</code>. If you decide to deactivate and uninstall WPGlobus, you must run the cleanup tool to keep only one language. See the details on the “Welcome” tab in the WPGlobus Settings.</li>
</ul>
</li>
<li>COOKIES:
<ul>
<li>WPGlobus use browser cookies to store the selected language in the form <code>wpglobus-language=xx</code> where <code>xx</code> is a two-letter language code: <code>en</code>, <code>de</code>, <code>fr</code>, etc.</li>
</ul>
</li>
<li>NO MULTISITE:
<ul>
<li>The multisite mode (multiple virtual sites sharing a single WordPress installation) is not tested and not supported.</li>
</ul>
</li>
<li>FREE PLUGIN with PAID EXTENSIONS:
<ul>
<li>Some functionality is available only with our premium add-ons. Details below.</li>
</ul>
</li>
<li>OLD PHP / OLD WORDPRESS:
<ul>
<li>We develop and test our software using the latest versions of PHP, WordPress, and all plugins. If you have an older version and something is not working properly – please upgrade before contacting us.</li>
</ul>
</li>
<li>MBSTRING:
<ul>
<li>For the full UTF-8 compatibility and better performance, please make sure that the <a href="https://www.php.net/manual/en/intro.mbstring.php" rel="nofollow ugc">Multibyte String</a> PHP extension is enabled.</li>
</ul>
</li>
</ul>
<h4>What is in the FREE version of WPGlobus?</h4>
The WPGlobus plugin provides you with the general multilingual tools.
<ul>
<li>Manually translate posts, pages, categories, tags, menus, and widgets;</li>
<li>Add one or several languages to your WP blog/site using custom combinations of country flags, locales and language names;</li>
<li>Switch the languages at the front-end using: a drop-down menu extension and/or a customizable widget with various display options;</li>
<li>Switch the Administrator interface language using a top bar selector;</li>
</ul>
The WPGlobus plugin serves as the foundation to other plugins in the family.
<h4>When do I need WPGlobus Extensions?</h4>
<ul>
<li>To translate URLs (<code>/my-page/</code> translates to <code>/fr/ma-page</code>, <code>/es/mi-pagina</code> and so on);</li>
<li>To “postpone” translation to all languages and publish only those that are ready;</li>
<li>To have completely separate menus for each language;</li>
<li>To translate WooCommerce products and taxonomies;</li>
<li>…and more.</li>
</ul>
For more details, please check out the extension descriptions on our website:
<ul>
<li><a href="https://wpglobus.com/product/woocommerce-wpglobus/" rel="nofollow ugc">WooCommerce WPGlobus</a>: adds multilingual capabilities to WooCommerce-based online stores.</li>
<li><a href="https://wpglobus.com/product/wpglobus-plus/" rel="nofollow ugc">WPGlobus Plus</a>: adds URL fine-tuning, publishing status per translation, and more.</li>
<li><a href="https://wpglobus.com/product/wpglobus-mobile-menu/" rel="nofollow ugc">WPGlobus – Mobile Menu</a>: makes the WPGlobus language switcher menu compatible with mobile devices and narrow screens.</li>
<li><a href="https://wpglobus.com/product/wpglobus-featured-images/" rel="nofollow ugc">WPGlobus – Featured Images</a>: Set featured image separately for each language defined in WPGlobus.</li>
<li><a href="https://wpglobus.com/product/wpglobus-translate-options/" rel="nofollow ugc">WPGlobus – Translate Options</a>: Selective translation of the texts stored in the <code>wp_options</code> database table.</li>
</ul>
<h4>Compatibility with WordPress Themes</h4>
<ul>
<li>WPGlobus works correctly with all themes that apply proper filtering before outputting content.</li>
<li>Some themes incorporate 3rd party plugins (e.g., sliders, forms, composers) – not all of them are 100% multilingual-ready. When you see elements that cannot be translated, please tell the theme/plugin authors.</li>
<li>Read more on the topic <a href="https://wpglobus.com/documentation/wpglobus-compatibility-with-themes-and-plugins/" rel="nofollow ugc">here</a>.</li>
</ul>
<h4>Compatibility with WordPress Plugins</h4>
We have tested WPGlobus with many plugins. However, since plugins are frequently updated, some adjustments may be required after a new update. We will do our best to monitor and make the necessary changes on our end.
<h4>Permalinks</h4>
IMPORTANT: WPGlobus will not work if your URLs look like <code>example.com?p=123</code> or <code>example.com/index.php/category/post/</code>.
Please go to <code>Settings->Permalinks</code> and change the permalink structure to non-default and with no <code>index.php</code> in it. If you are unable to do that for some reason, please talk to your hosting provider or systems administrator.
Note: WooCommerce adds their own section to the Permalinks. It is important to fill in all the information. For example, you need to specify your Shop Base, for example, <code>/product/</code>. If you leave it blank, WooCommerce will try to translate the base (eg <code>/produkt/</code> for German), which will result in a 404 error.
<h4>Developing on `localhost` or custom ports</h4>
WPGlobus may not work correctly on development servers having URLs like <code>//localhost/mysite</code> or on custom ports like <code>//myserver.dev:3000</code>. Please use a proper domain name (a fake one from <code>/etc/hosts</code> is OK), and port 80.

WPGlobus

This is a fantastic plugin and very well coded.

A customer noticed a small compatibility issue with the plugin and my Total theme where certain background color settings wouldn't work in the customizer. This is because some of my settings are named using the format "element_background" and it looks like the plugin only excludes settings with the word "color" in them. 

Anyway, it was very easy to browse through their code since it's very clean and well commented to locate the "wpglobus_customize_disabled_setting_mask" filter so I could exclude settings that also have _background and _bg in the setting name.

The plugin is extremely developer friendly.

Great work!

Awesome plugin and well coded

Multilingual/Globalization: URL-based multilanguage with an easy translation interface.

Double Opt-in for CF7 vs WPGlobus