This is a simple demo page showing req_replacer in action.
The next three lines will output the variables in the URL. The custom variable doesn't exist, but if you add &custom=Your Text at the end of the address bar, Your Text will appear on the third line.
Option Variable:com_content CODE (make text lowercase for plugin to function): {REQ_REPLACE}option{/REQ_REPLACE}
View Variable: article CODE (make text lowercase for plugin to function): {REQ_REPLACE}view{/REQ_REPLACE}
Custom Variable: CODE (make text lowercase for plugin to function): {REQ_REPLACE}custom{/REQ_REPLACE}
