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<?
if (preg_match('/^(\d{5})(-\d{4})?$/',$_POST['zip'],$matches)) {
print "$matches[0] is a valid US ZIP Code\n";
print "$matches[1] is the five-digit part of the ZIP Code\n";
if (isset($matches[2])) {
print "The ZIP+4 is $matches[2];";
} else {
print "There is no ZIP+4";
}
}
$is_bold = preg_match('@<b>([^<]+)</b>@',$html,$matches);
if ($is_bold) {
print "The bold text is: $matches[1]";
}
?>
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