Hi. I have googled and searched here long enough. I did not find an answer. 
I have done my homework then and read TFM.
In my current custom solution, I send in each email a few random links from a pool of links (in a simple text file, selected by a short php code) to pages on my site.
How can I do this with phplist ?
@phplistov You could develop a plugin that replaces a custom placeholder say [RANDOM] by your random content. See the date placeholder plugin for an example of how placeholder replacement is done https://resources.phplist.com/plugin/dateplaceholder
thank you duncanc
Develop a plugin only to insert a few lines of html code? no thank you.