perl 处理perl返回的json

[root@wx03 ~]# cat a14.pl
use Net::SMTP;
use LWP::UserAgent;
use HTTP::Cookies;
use HTTP::Headers;
use HTTP::Response;
use Encode;
use JSON;
use File::Temp qw/tempfile/;
use HTTP::Date qw(time2iso str2time time2iso time2isoz);
use Data::Dumper;
my $CurrTime = time2iso(time());
my $dis_mainpublish='中均资本';
my $ua = LWP::UserAgent->new;
$ua->timeout(10);
$ua->env_proxy;
my $now          = time();
$ua->agent('Mozilla/5.0');
my $cookie_jar = HTTP::Cookies->new(

file           => 'lwp_cookies.txt',
autosave       => 1,
ignore_discard => 1
);
$ua->cookie_jar($cookie_jar);
my $response = $ua->get("http://120.55.118.6:3000/api/getcode?env=zj&phone=18072722237");

if ($response->is_success) {
$r = $response->decoded_content;
print "\n";
}
else
{
die $response->status_line;
};
#my $r=encode_utf8($r);
my $hash = decode_json ( $r );
print $hash->[0]->[1];
print "\n";
[root@wx03 ~]# perl a14.pl

Wide character in print at a14.pl line 38.
您的验证码为813231，本验证码30分钟内有效。