Perl变量作用域并在if / else块中使用相同的变量

$var1
$var2
$var3

if(condition) {
...
}
else {
...
}

我需要在块中访问$vars1,2和3,但我不能.我想我有一个范围问题.我尝试将它们设为全局,但我看到很多错误并且程序运行不正常.我错过了什么？

这是我的代码.我的问题是服务器需要底部的变量(@varList等),因为这是一个也使用CGI的apache服务器上的脚本.它吐出这样的错误：

[error] Global symbol "$questionslist" requires explicit package name at /home/megaoff/www/vi
ewquestions.dhtml line 46.nGlobal symbol "$site" requires explicit package name at /home/megaoff/www/viewquestions.dhtm
l line 46.nGlobal symbol "$xs" requires explicit package name at /home/megaoff/www/viewquestions.dhtml line 46.nGlobal
 symbol "$username" requires explicit package name at /home/megaoff/www/viewquestions.dhtml line 46.n

#!/usr/bin/perl

use strict;
use CGI;
use BarryP;

my $pagev = BarryP::makeP("noextracook",1);
my $bvga = $pagev->{'vga'};
my %vga = %$bvga;
my $cgi = CGI->new;
my $usePage = "answerquestions.html";
my $anslist = "/home/megaoff/www/limages/anslist.txt";
my $unanslist = "/home/megaoff/www/limages/unanslist.txt";

my $action = $vga{"action"};


if($action eq 'adminmode') {
    my @a_list = $pagev->listFile($anslist);
    my %list = map { split(/t/,$_,2) } @a_list;
}   
else {
    my @u_list = $pagev->listFile($unanslist);
    chomp @u_list;
    my %questions = map { $_ => '' } @u_list;
    my $question = $cgi->param('question');
    my $answer = $cgi->param('answer');
    chomp($question,$answer);

    open(my $ANS,'>>',$anslist) or die "Can't open file $anslist: $!";
    print $ANS "$questiont$answern";
    close($ANS) or die "Can't close file $anslist: $!";

    delete $questions{$question};
    open(my $UNANS,'>',$unanslist) or die "Can't open file $unanslist: $!";
    print $UNANS "$_n" foreach keys %questions;
    close($UNANS) or die "Can't close file $unanslist: $!";

    my $questionslist = join("<br>",@u_list);
    my $site = $pagev->{'site'};
    my $xs = $pagev->{'xs'};
    my $username = $pagev->{'username'};
}

my @varList = ('questionslist',$questionslist,'action',$action,'site',$site,'xs',$xs,'$username',$username);

$pagev->pageHeader($usePage,@varList);