perl 时间差计算
如何用perl计算时间差：
$a = "Mon Feb 25 16:05:03 2013";
如何计算$a 与当前的时间差，结果是 秒 小时 天都可以
[解决办法]
use HTTP::Date;
my $str1 = "Mon Feb 25 16:05:03 2013";
my $sometime = HTTP::Date::str2time( $str1, '+0800' );#北京时间，'+0800'
print "$sometime" . "\n";
my $now = time();
print "$now" . "\n";
my $delta = $now - $sometime;
print "second: $delta" . "\n";
$delta /= 3600;
print "hour: $delta" . "\n";
$delta /= 24;
print "day: $delta" . "\n";
use Time::Piece;
my $a = "Mon Feb 25 16:05:03 2013";
my $t1 = Time::Piece->strptime($a, "%a %b %d %H:%M:%S %Y");
my $t2 = localtime;
my $s = $t2 - $t1;
print join "\n", $s->seconds, $s->minutes, $s->hours, $s->days;
