I have a very simple pattern matching code.

use utf8;

my $datetime = "20100604 074813+0000";
my $regexp = '(\d{4})(\d{2})(\d{2})\s*(\d{2})(\d{2})';

if ($datetime =~ /${regexp}/) {
    print "$4\n";
}

[download]

This is the sample code. This is supposed to give me 07 and it works when I run this sample script. But it doesn't work in the production. The $datetime in production is read from a unicode encoded XML file. There, it's giving me 0748.

I have been debugging this since morning but couldn't see why it behaves in this weird manner. My only guess is it has got something to do with $datetime being unicode.

Can someone help me root-cause this?

In reply to Simple pattern match failing - Possibly unicode issue by irahul

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