Set up find and replace rules that are executed AFTER a page is generated by WordPress, but BEFORE it is sent to a user's browser.
This plugin allows you to dynamically (i.e. at the time when a page is generated) replace code and text from themes and other plugins with code and text of your choosing before a page is delivered to a user's browser.
Because the find and replace happens in real-time no changes are needed to plugins or themes which means upgrades remain easy!
Here are some real-world examples:
Here are some more examples:
And remember, all of the above can be done WITHOUT modifying themes or plugin files so you'll always be able to upgrade them without having to worry about losing custom edits.