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How about something like:

my $file_name = ...; my $file; { open(my $fh, '<', $file_name) or die("Unable to open input file: $!\n"); local $/; $file = <$fh>; } my ($P) = $file =~ /A(.*?)B/ or die("Unable to find 'P'\n"); $file =~ s/(C.*?)\Q$P\E/$1Q/g; { open(my $fh, '>', $file_name) or die("Unable to open output file: $!\n"); print $fh $file; }

Update: Added \Q...\E.

In reply to Re: Second Time Replace Regex by ikegami
in thread Second Time Replace Regex by Anonymous Monk

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