phplist Documentation: Message Tracking: "Click tracking
Click tracking monitors whether a recipient has clicked on a link contained within a HTML or Text message. When enabled, all links in your messages will be converted to links that go through phplist. This will make sure that clicks are tracked and registered in the database. Click tracking can therefore be a simple and reliable way to monitor how many people have clicked through to your site from a message you have sent.
Note: Keep in mind that click tracking still is experimental. Your feedback is welcome and may help improve this feature.
If you want to use click tracking, you need to enable the clicktrack setting in your config.php file:
# Click tracking
# If you set this to 1, all links in your emails will be converted to links that
# go via phplist. This will make sure that clicks are tracked. This is experimental and
# all your findings when using this feature should be reported to mantis
# for now it's off by default until we think it works correctly
define('CLICKTRACK',1);
# Click track, list detail
# if you enable this, you will get some extra statistics about unique users who have clicked the
# links in your messages, and the breakdown between clicks from text or html messages.
# However, this will slow down the process to view the statistics, so it is
# recommended to leave it off, but if you're very curious, you can enable it
define('CLICKTRACK_SHOWDETAIL',0);"
