With this simple module, you can make variables local to a filehandle (like the $= and $~ variables). Use control variables (like $^N or $^Z) to get "true" globals (variables which are in every package).
package Tie::PerFH;

my %value;

sub TIESCALAR { bless do { \my $x }, shift }
sub FETCH { $value{select()}{$_[0]} }
sub STORE { $value{select()}{$_[0]} = $_[1] }

1;

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In reply to Filehandle local variables by japhy

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