No need to use eval, I'd prefer one of... 
sub foo { (my $text = $_[0]) =~ s/$_[1]/$_[2]->($1)/e;
          print $text; }

foo("This is test 1\n", qr/test (.*)/, sub{"fish $_[0]"});

[download]
...or... 
sub foo { (my $text = $_[0]) =~ s/$_[1]/$_[2]->()/e;
          print $text; }

foo("This is test 1\n", qr/test (.*)/, sub{"fish $1"});

[download]

In reply to Re^2: How do I pass $1 to s///? by Anonymous Monk
in thread How do I pass $1 to s///? by Anonymous Monk

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