A Bash Shell Script to replace a string in files of a directory recursively.

replace_in_files.sh

#!/bin/bash

Files=(`grep -r "\.sgk" ./ | cut -d: -f1 | uniq`)

for file in "${Files[@]}"
do
  echo "Filename: $file"
  grep "\.sgk" "$file" | more
done
echo ""

answer=N
echo -n "Is this result right? Do you want to change the string of the files? (y/N)"
read answer

if [[ "$answer" == [Yy] ]]
then
  for file in "${Files[@]}"
  ¦ do
  ¦ ¦ sed -i "s:\.sgk:\.php:g" "$file"
  ¦ done
  ¦ if [[ $? == "0" ]]; then
  ¦ ¦ echo -e "Done.\n"
  ¦ fi
else
  echo -e "Okay,bye...\n"
fi