Takayuki Miyoshi

<p>Double Opt-In Helper is a WordPress plugin that helps developers implement the double opt-in process in their plugins.</p>
<h4>What is double opt-in?</h4>
<p>Double opt-in is a procedure used to confirm user’s consent. Today, service providers are required to obtain clear consent from users prior to collecting or using their personal data. In some situations, however, asking the user to tick an “I agree.” checkbox is not sufficient. Double opt-in serves a useful role in such situations.</p>
<p>A typical double opt-in process starts by the service provider sending an email message to the user. The message includes a URL link to the provider’s website and asks the user to click the link if they agree on conditions. Usually, the URL includes some sort of unique random code that works as a token to confirm the user’s consent.</p>
<p>By doing this, the service provider can confirm that the real user (not a bot or someone else) has consented, because only the user should be able to access messages to their email address.</p>
<h4>I’m a developer. How can I use this plugin?</h4>
<p>First, register an “agent” who can handle double opt-in sessions for you, and knows what to do when a user opts-in.</p>
<p>To register an agent, use the <code>doihelper_register_agent()</code> function. <code>doihelper_register_agent()</code> takes two parameters: the name of the agent (required), and an optional associative array of arguments. The available arguments are:</p>
<ul>
<li><code>acceptance_period</code> — The length of time (in seconds) for how long a double opt-in session remains live. Default value: 86400 (24 hours)</li>
<li><code>optin_callback</code> — The callback function that will be called when a user opts-in.</li>
<li><code>email_callback</code> — The callback function that will be called to send a confirmation email.</li>
</ul>
<p>After registering an agent, start a double opt-in session by calling the <code>doihelper_start_session()</code> function. <code>doihelper_start_session()</code> takes two parameters: the name of the agent (required), and an optional associative array of arguments. The available arguments are:</p>
<ul>
<li><code>email_to</code> — The recipient’s email address, used for the confirmation email. If you omit this argument, no email will be sent. If you do not provide this argument, you will need to provide the user with the confirmation link another way.</li>
<li><code>properties</code> — The properties array of the session. This array is to be passed to the <code>optin_callback</code> function as its only parameter. While you can include any information into this, the primary purpose of it is to pass user-related data to the opt-in callback.</li>
</ul>
<p>The session data will be stored in the database until the user opts-in, or the acceptance period (from <code>doihelper_register_agent()</code>) expires.</p>


Double Opt-In Helper

Double Opt-In Helper is a WordPress plugin that helps developers implement the double opt-in process in their plugins.

joshuabettigole

<blockquote>
<p><strong>This plugin requires Contact Form 7, version 3.1</strong></p>
</blockquote>
<p>The Contact Form 7 – Campaign Monitor Addon plugin adds functionality into Contact Form 7 generated forms to automatically submit subscribers to a predetermined list within a Campaign Monitor client account. The plugin settings are configured on a per-form basis on the Contact Form 7 configuration pages.</p>
<blockquote>
<p>If you like this plugin, consider <a href="http://www.bettigole.us/donate/" rel="nofollow ugc">donating</a> to help me offset the time spent working on it. In return, I promise not to bother you with nag dialogs on your WordPress admin pages!</p>
</blockquote>
<h3>Requirements</h3>
<h4>WordPress</h4>
<p>This plugin was built and tested on WordPress version 3.3.1 It should work with version 3.2, but this configuration is untested. Earlier versions are not supported by Contact Form 7, therefore, can not be supported by this plugin.</p>
<h4>Contact Form 7</h4>
<p>Contact Form 7 provides the form configuration and processing functionality necessary for this plugin to work. There are no configuration options for this plugin outside of the Contact Form 7 configuration screens. You will also need a basic understanding of how to configure Contact Form 7. View the Contact Form 7 plugin <a href="http://contactform7.com/docs/" rel="nofollow ugc">documentation</a> for an explanation of fields and how to configure forms.</p>
<h4>Campaign Monitor Reseller Account</h4>
<p>The Campaign Monitor API (Application Programming Interface) requires the API Key provided to members with accounts directly on Campaign Monitor. Client accounts do not have access to this key. If you did not sign up directly with Campaign Monitor, you will need to ask your service provider for the API Key.</p>
<h3>ToDo</h3>
<ul>
<li>Add support for the same languages supported by Contact Form 7. (In need of assistance with this)</li>
<li>White Label the configuration options.</li>
</ul>


Contact Form 7 – Campaign Monitor Addon

Add the capability to create newsletter opt-in forms with Contact Form 7. Automatically submit subscribers to predetermined lists in Campaign Monitor.

Double Opt-In Helper vs Contact Form 7 – Campaign Monitor Addon