You're on the right track. After this: $lines =~ s/foo/bar/gms;the substitution has been made, but it's still in memory. The next step is to write it to the file: 

open(FILE, ">theother.txt")
    or die "Can't open the other file: $!\n";
print FILE $lines;
close FILE;

[download]
You said "other file", so I'm not sure if you want to overwrite the original file or not. If you do, just substitute its name instead of theother.txt above.

HTH

In reply to Re: Regex to find/replace in a file by VSarkiss
in thread Regex to find/replace in a file by amarceluk

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