Yes it's possible but for good reasons it's not recommended!

That's why it's not allowed with use strict so you need to disable strict locally!

use strict;

our $a="func";
sub func {print shift}; 

{
  no strict 'refs';
  &$a(42);
}
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But this approach should only be the last possible choice!

hollis solution is much cleaner and defining a dispatch table can be done in a very compact way:

my %dispatch=(
    func1 => sub { print shift },
    func2 => sub { print 1+ shift },
       );

$dispatch{func1}->(42);
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