Re: Re: Re: Regex to match file extension in URL

If that's the case, then how about

if ($myvar =~ m/\.([^.]+)$/) {
print "Matched $1";
}
[download]

Of course, this won't work for URL's with an implicit filename, like "http://www.yahoo.com" or "http://www.somewhere.com/home/" You'll have to catch those bad boys elsewhere in your code.

Gary Blackburn
Trained Killer

Comment on Re: Re: Re: Regex to match file extension in URL Download Code

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Re: Re: Re: Re: Regex to match file extension in URL by Amoe (Friar) on Sep 09, 2001 at 17:15 UTC
Let me break this down and learn :) `\. # literal period ( # start capture [^.] # any character that's not...any character? + # one or more of them ) # stop capture $ # end of line` [download] I don't get `[^.]`. 'Splain? :)	[reply] [d/l] [select]
Re: Re: Re: Re: Re: Regex to match file extension in URL by Trimbach (Curate) on Sep 09, 2001 at 19:07 UTC
You got it right, except for the negated character class. Because the metacharacter "." is meaningless inside a character class (because "." and `[.]` would be the same thing) the period means a literal period inside a character class. So the regex is actually: `\. # literal period ( # start capture [^.] # any character that's not a period + # one or more of them ) # stop capture $ # end of line` [download] This guarantees that you'll get the last chunk of non-periods at the end of URL... but beware because like I said "http://www.yahoo.com" will match "com", and "http://www.somewhere.com/home/" will match "com/home/". Gary Blackburn Trained Killer	[reply] [d/l] [select]