You might try poking around in the CGI object...

my $file_name = param('photo');

use Data::Dumper;

print Dumper($CGI::Q->{'.tmpfiles'});
[download]

Even better could be to save the state of the form, submitted from the browser...

use CGI qw(:standard);

open(SAVE, ">test.out") or die "Can't open test.out: $!\n";
save_parameters(SAVE);
[download]

...and then use that saved state to run the program in the debugger:

use CGI qw(:standard);

open(SAVE, "test.out") or die "Can't open test.out: $!\n";
restore_parameters(SAVE);

$photo_save_name ="something";
    
my $file_name = param('photo');

# ...
[download]

Then you can use all the wonderful features of the debugger to figure out why uploadInfo() isn't working as expected. ;)