For WordPress plugin developers: keep a register of when and where your plugins are activated.
Please be aware that this plugin break the privacy that users of WordPress plugins have traditionally enjoyed. For many users the fact that a plugin developer is aware they are using a particular plugin will not be a problem, but for others it could caue an issue. For example, the website using your plugin may be private - even behind a firewall - or restricted. Informing you as the developer about that site could even break policies or guidelines which are in force on the site.
It is important to ensure that you do everything you can to ensure people are aware of what the use of this Plugin Register code will do. Here is the text I've been using in my plugins:
"Please note: On activation this plugin will send a message to the developer with your site name and URL. This information will be kept private. If you are not happy with the developer knowing you are using their plugin, please do not use it."
Feel free to use that, or write your own. This text should be displayed prominently in the description of your plugin - most importantly BEFORE the user has installed/activated it.
In the future I may make the registration of plugins an optional thing, for example by showing a message on activation that says something like "Thank you for using this plugin. Please click here to register your website with the plugin developer so they know you are using it."
Requires: 2.8 or higher
Compatible up to: 4.3.5
Last Updated: 9 months ago
Active Installs: 100+
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