This is a very simple add-on I put together in order to allow an administrator to do a regular expression find and replace in the content of all posts.
It was written in order to find all instances of a custom BB code tag for embedding YouTube video in an imported posts, and convert them to XenForo's :
Limitations:
The system will not check that your regular expression is valid, or that it matches. It will fall over if your expression does not compile, and it will...
