if $var = 'func'; just call &$var();

but don't do that. It will complain (as well it should) under use strict;

Use a dispatch table instead:

use strict;

sub func
{
    print "func ran\n";
}

my %dispatch =
(
    func => \&func
);

my $var = 'func';

&{$dispatch{$var}}();
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