In your last example you missed the localising, it should be:

{
   undef local $/;     # with localising
   open (FH, $filename);
   while(<FH>) {
      blah
   }
}

[download]

And then - as nobody has done this yet - I add the two definitive links to that topic, both articles from mjd found on his website Coping with Scoping and Seven useful uses of local.

-- Hofmator

In reply to Re: Re: what is the difference between 'my' and 'local'? by Hofmator
in thread what is the difference between 'my' and 'local'? by kiseok7

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