I am working on a project where the client requires there to be periods in some of the variable names in the SPSS output (> v16) from the surveys. I figured that the easiest way to accomplish this would be to use a placeholder "ZZ" for the periods in limesurvey and then use a str_replace function to modify these before output.
Looking at export.php line 566, there already is an function with an array. I appended my intended function to this but it doesn't seem to have any effect. See below. Am I missing something obvious?