In PHP land you can use this handy built in function ( http://php.net/manual/en/filter.examples.validation.php ) which works well enough.
Stop Validating Email Addresses With Your Complex Regex
21–30 of 211 posts
Re: Stop Validating Email Addresses With Your Complex Regex
#22Agree with you 100 percent.
Re: Stop Validating Email Addresses With Your Complex Regex
#23I agree with the author of this blog, but he doesn't address the problem where you want to scrap all the email addresses in a text file. For this situation, I don't see what to use except regexp.
Re: Stop Validating Email Addresses With Your Complex Regex
#24My goto for email validation is /^.+?@.+?\..+?$/ Incase I've typed it wrong, that should basically work for anything that contains at least one @ and one dot, in that order, as well as at least one character at beginning, middle and end. It's served me well thusfar. Edit for clarification: The reason I prefer this over just checking for an @ is that if you're just checking for @ a common mistake like "me@hotmail,com"…
I think that the domain part of email addresses could be an IP address. Depending on how IPv6 addresses are displayed there, they won’t contain a dot. Somewhat artificial, yes.
I'll admit I hadn't considered IPv6b addresses, might have to rethink my trusty regex. Sad, it's served me well for so many years.
Re: Stop Validating Email Addresses With Your Complex Regex
#25My goto for email validation is /^.+?@.+?\..+?$/ Incase I've typed it wrong, that should basically work for anything that contains at least one @ and one dot, in that order, as well as at least one character at beginning, middle and end. It's served me well thusfar. Edit for clarification: The reason I prefer this over just checking for an @ is that if you're just checking for @ a common mistake like "me@hotmail,com"…
I thought new TLD being worked on didn't need to have dots in them. Why not just check for x@x?
That's exactly what you should do.
^(.+)@(.+)$
max length is 254 according to the RFC I believe, so you can check for that too.
Re: Stop Validating Email Addresses With Your Complex Regex
#26For those that use PHP, use the following:
filter_var($email, FILTER_VALIDATE_EMAIL);
Regex from the source: https://github.com/php/php-src/blob/master/ext/filter/logica...
Re: Stop Validating Email Addresses With Your Complex Regex
#27"Feeling ambitious? Then check for the dot too: /.+@.+\..+/i. Anything more is overkill." I personally prefer: /[^@]+@[^@]+\.[^@]+/ Basically the same except that it will throw an error if someone enters an extra at sign.
Yeah, I basically check for one @ sign and some very basic sanity checking on the right side.
/^[^@]+@[^@]+\.[^@.]+$/
Re: Stop Validating Email Addresses With Your Complex Regex
#28HTML5 has you covered. You can use HTML5 input verification with the following:
Re: Stop Validating Email Addresses With Your Complex Regex
#29I don't validate emails at all. If you want to enter 'a' that's fine but you won't get any emails.
Re: Stop Validating Email Addresses With Your Complex Regex
#30This has been an issue since the day I started programming for the web, back somewhere in '95. It has regularly come up on HN, and pretty much any programming related forum I've used since the mid-90's. As an industry at the heart of the information society you have to wonder what the hell we are doing wrong if we cannot stop this constant regression into well known bad practices.
I understand the argument re validating email addresses passively (regex, no regex, etc.) vs actively (send an email by SMTP).
What I don't understand with this ever-repeating discussion is why the complexity has to be visible. e.g.
>
> Yeesh. Is something that complex really necessary?
What is so special about parsing email addresses that makes everyone invent their own solution - regex or otherwise?