Perl: Undefined subroutine &main::gmdate?

Here is what I'm trying to do (nothing complex):

use Digest::MD5 qw(md5 md5_hex md5_b开发者_如何学Pythonase64);

$apikey = '1234';  
$secret = '123';  
$timestamp = gmdate('U');
$sig = md5($apikey . $secret . $timestamp);

echo $sig

So, the error occurs on the $timestamp = gmdate line.

What am I doing wrong?

I think you are looking for the gmtime function, not the gmdate function. Although, now that I see that you are passing 'U' into it, I am confused.

Ah, I see now, PHP uses gmdate('U') the same way Perl 5 uses gmtime().

Whoops, my memory failed, you need to use Time::Local or POSIX::mktime to turn the result of localtime or gmtime into the epoch seconds.

#!/usr/bin/perl

use strict;
use warnings;

use POSIX qw/mktime/;
use Time::Local qw/timegm/;

print "the time is now ", timegm(localtime()), " or ", mktime(gmtime()), "\n";