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Home: Perl Programming Help: Regular Expressions: Matching On Metacharacters

Eric New User Jun 24, 2002, 6:40 PM Post #1 of 6 (1916 views) Matching On Metacharacters Can't Post  I need some assistance in matching on Metacharacters to reject any e-mails which may contain these WITHIN the boundaries marked with an X below (am already filtering at the X parts with other expressions and this is working fine). Except for a "." (period). XsomenameX@Xsome.domainX.TLD I'd also like to match any commas, dollar signs or forward slashes, etc., but not sure if I need to 'escape' all of the characters or just the metacharacters within a [] format like: [~!@#%=;:'"<>,\+\?\*\^\$\[\]\{\}\|\\] and in two separate matches: 1. Between the 1st character (X) and the last character (X)of whatever preceeds the "@". Like: $email !~ m/XmetamatchhereonlyX@/ 2. Between the 1st character (X) and the last character (X)of whatever follows the "@" and preceeds any final "." just before the TLD extension. And: $email !~ m/\@XmetamatchhereonlyX\.[A-Za-z]{2,4}$/> WHEW!!! Thanks for any help. Eric

Eric New User Jun 24, 2002, 6:47 PM Post #2 of 6 (1913 views) Re: [Eric] Matching On Metacharacters [In reply to] Can't Post I forgot to mention that I can NOT do that match using a word boundary, because observations have been some addresses are entered like: so meje rk@bo gus.tld I'm already bouncing back those with white spaces in an earlier match :-) The trick is trying to figure out how to perform the match starting with the 2nd character through the next to last character BEFORE the @ in the first case, and then a separate match starting with the 2nd character after the @ through the next to last character BEFORE the (or any) Final "." just before the ending TLD (which is why I used a $ anchor in the 2nd expample posted). Eric

Jasmine Administrator Jun 26, 2002, 10:53 AM Post #3 of 6 (1906 views) Re: [Eric] Matching On Metacharacters [In reply to] Can't Post If you're just looking for email validity, check out the [url=http://search.cpan.org/search?dist=Email-Valid]Email::Valid module.

Eric New User Jun 28, 2002, 12:25 AM Post #4 of 6 (1901 views) Re: [Jasmine] Matching On Metacharacters [In reply to] Can't Post Tnx for the tip, Jasmine...I'll go take a look. The Metacharacter match Regexp would finalize the rest of what is working pretty well if you can shed any light, however. Regards, Eric

Paul Enthusiast Jul 15, 2002, 5:17 PM Post #5 of 6 (1883 views) Re: [Eric] Matching On Metacharacters [In reply to] Can't Post I'm not 100% sure on what you are asking but if you are wanting to match meta characters you should use \Q \E in your regex to escape them...eg... if ($something =~ /^\Qmy.name@domain.com\E$/) {

mahesh18 New User Dec 2, 2002, 10:59 PM Post #6 of 6 (1795 views) Re: [Paul] Matching On Metacharacters [In reply to] Can't Post hi Paul, the answer that u have given about "Matching On Metacharacters" has gave a lot help to me in my project. thanx a lot for it as u share ur knowledge with all of us. regards/mahesh

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