I ran into undefined variables while iterating through a multidimensional hash containing all sort of server info using that function. I silenced them with a simple modification (checking if the parts of the IP is "defined"):
sub IP_valid {
my $ip = shift;
$ip =~/^(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})$/;
foreach ($1,$2,$3,$4){
if ( defined $_ && $_ <256 && $_ >0) {next;}
return 0;
}
return 1;
}
Sure, that could have been added earlier but that if test was already checking multiple factors so it was easier to add. Thanks for this simple write-up! Just what I was looking for. Wow, 15 years later.
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