Please note this is an old forum thread. Information in this post may be out-to-date and/or erroneous.
Every phpdocx version includes new features and improvements. Previously unsupported features may have been added to newer releases, or past issues may have been corrected.
When placing a variable in footer and replacing it with $docx->replaceVariableByText(), the variable is not replaced. Placing the variable into the body, everything works fine.