Bash - sed syntax with variables -

i've got 2 variables var1 , var2 contain strings. want go through list of files have .txt extension , change occurences of var1 var2. far, looks this:

for in `find . -name "*.txt"`  echo $i  sed -i -e "s|\$var1|\$var2|g" $i done 

i think except sed line working well. think it's syntax issue, haven't been able figure out is. appreciated thanks

you shouldn't need escape $ variable. make sure use lower case -e , quote filename in case has spaces:

sed -ri -e "s|$var1|$var2|g" "$i"