Replaced all "=&" with "=" removing remaining deprecated assignment by reference
find ./ -type f -name \*.php -print | xargs sed -e 's/=\&/=/g' -i
Replaced all "&$var" with "$var" removing all remaining deprecated addressing by reference
find ./ -type f -name \*.php -print | xargs sed -e 's/\&\$/$/g' -i