Following is the script to find any phrase and replace it with another.
for i in `grep –include=”*\.include” -rl ‘phrase to search’ /var/www/`; do
sed –in-place=bak -e ‘s/phrase to search/phrase to replace with/g’ “$i”
done
The above script searches folder /var/www and all of its sub folders with any file with extension .include for phrase “phrase to search” and will replace all the found phrases with phrase “phrase to replace with”