Why? Does field_as_text have a side effect? If so, it's poorly named.

If the assignments are the side effects you want to perform unconditionally, then move them out of the condition.

my $num  = $recFono->field_as_text('102');
my $type = $recFono->field_as_text('104');
if ($num || $type) {
   ...
   if ($type) {
      ...
   }
   ...
}
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If it's a scoping issue, create a scope.

{
   my $num  = $recFono->field_as_text('102');
   my $type = $recFono->field_as_text('104');
   if ($num || $type) {
      ...
      if ($type) {
         ...
      }
      ...
   }
}
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