Hello, All:
I'm curious about the behavior of backreferences in a regular expression
that I've created:
$url = m|^(http://)?((\.?[a-z0-9][a-z0-9\-]+)+(\.[a-z0-9]){2,3})/|
What's unusual about this regex is that the backreferences for any
sub-domains (i.e., www, ftp, &c.) are not caputured. e.g., Setting
$url equal to http://www.pretorious.net returns...
$1 = http://
$2 = www.pretorious.net
$3 = .pretorious
$4 = .net
While $2 holds the value that I am searching for, I'm still curious: How
can I flexibly capture any sub-domain portions of the hostnames. (Even the
tricky ones like www.developers.earthweb.com...)
--
Eric P.
Sunnyvale, CA
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