RegExp email validation problem: domain contains hyphen

[dalecosp]

I'm using:

$EmailPattern = "^{([0-9a-z]+)([0-9a-z.-]+)@([0-9a-z.-]+).([0-9a-z]+)";}

to validate a user email addy.

Problem: users with [e-mail] can't
authenticate with this pattern, while [e-mail] can...

I've got a "hyphen" in the regexp...what's up? Needs escaped?
(tried that...)

I'm googling, but not finding much...😕
I think this was working when I wrote it!!

$EmailPattern = "^{\w+@[a-zA-Z_]+?.[a-zA-Z]{2,3}$";}

certainly didn't work, probably developed for .asp

Any thoughts? TIA

dalecosp

P.S. Actually, several of my codings have seemed counter-intuitive
today...anyone on FBSD with a new -STABLE out there? (furtively, he grasps yet another straw...)

[Andrew_Dear]

this should work:
[A-Za-z0-9-]+@[A-Za-z0-9-]+.[A-Za-z]{2,4}

4: is for .info

or am i missunderstanding...

[dalecosp]

escaped the wrong hyphen!

!@gr^(*$#@!!!

---how's that for a 'regular expression'😉

dalecosp

[dalecosp]

Originally posted by Andrew Dear
this should work:
[A-Za-z0-9-]+@[A-Za-z0-9-]+.[A-Za-z]{2,4}

4: is for .info

or am i missunderstanding...

No misunderstanding. But pilot error. I settled on 'escaping' the
correct 'hyphen'.....

$EmailPattern = "^{([0-9a-z]+)([0-9a-z.-]+)@([0-9a-z.-]+).([0-9a-z]+)";}

Thanks, Andrew!!

[crimaniak]

just make it first or last in the [], like here:

define('REGEXP_EMAIL',"^{[-a-zA-Z0-9\.]{2,}\@([a-zA-Z0-9\-]+\.){1,5}[a-zA-Z]{2,4}$");}

[dalecosp]

Thanks, Crimaniak!!

Escaping the character SEEMED to work, but failed on
2nd try.....I tried moving it to the end today, and it has worked
everytime since I made that change. Now I see that you had given such advice---shoulda checked email this morning, would have saved a few more minutes with the editor....

Do you know WHY that had to be done that way?? Nothing in my examples or reading would indicate that ordering of characters in the regexp makes a difference....

Dalecosp

[Weedpacket]

I can't tell if you're using ereg or preg functions, so I'll just say that the preg syntax is covered in the PHP manual while the ereg syntax is (as noted in the manual) in the POSIX regexp manpages (which, if you're on a Windows system, are bundled with PHP).

Both note the necessity of positioning hyphens specially because of the fact that they're used in indicate character ranges (such as A-Z).

[0-9a-z.-_]

Would mean "any character in the ranges 0 to 9, a to z, or . to _". In other words, any of the characters

./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[]^{_abcdefghijklmnopqrstuvwxyz}

Be aware, that ".museum" is a valid top-level domain, so you may want to go to {2,6}

[dalecosp]

Originally posted by Weedpacket
I can't tell if you're using ereg or preg functions, so I'll just say that the preg syntax is covered in the PHP manual while the ereg syntax is (as noted in the manual) in the POSIX regexp manpages (which, if you're on a Windows system, are bundled with PHP).

Both note the necessity of positioning hyphens specially because of the fact that they're used in indicate character ranges (such as A-Z).

Well, actually, eregi(); and I'm on Unix, not that either is an excuse. As Mr. Spock would say, "flawlessly logical!" Makes
perfect sense, just wasn't too obvious to this tired and rather inexperienced regexp'er. Which means I should be astonished that I even tried moving the 'hyphen,' although, as most of us know, when you've spent more than an hour or two debugging one script, you try EVERYTHING :-)

Thanks much for your explanation, Weedpacket...

dalecosp