The best solution is to store them in an array: 
my @handles;
for ( 1...31) {
    open(my $new_fh, ">200712$_"), or die "Could not open $date $!\n";
    push @handes, $new_fh;
}

[download]

The file handles are closed automatically when they go out of scope (and no reference to them exists anymore), so you don't need to close them explictly.

But it's good style to close them anyway, because if your function becomes part of a larger program the opened file handles my suck up resources.

In reply to Re: How can you check to see if a file handle is already open? by moritz
in thread How can you check to see if a file handle is already open? by agent_smith

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