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validating an email

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Jun 07.2005

i have this code to validate an email

[code=php]if (preg_match(“/^[w-.]+@[w-.]+.[w-]+$/i”,$str))[/code]

but the problem is when i have an email like :

[QUOTE]

[email protected]

[/QUOTE]

in this case the
check fails!!!!!
how to i handle the case that after the @ can be a case of 1 dot or of 2 dots?
thnaks in advance
peleg

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PHP

7 Comments(s) ↴

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@chrysJun 07.2005 — Here is the best, the ultimate, regexp for e-mail checking. I use it everywhere.

/^(([A-Za-z0-9]+_+)|([A-Za-z0-9]+-+)|([A-Za-z0-9]+.+)|([A-Za-z0-9]+++))*[A-Za-z0-9]+@((w+-+)|(w+.))*w{1,63}.[a-zA-Z]{2,6}$/
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@pelegk1authorJun 07.2005 — firtst thnaks alot!

second can u explain a little what going there ?
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@chrysJun 07.2005 — Not a chance ?

Basically, all of these domains will come up as invalid:

email

[email protected]

email@address

And these valid:

[email][email protected][/email]

[email][email protected][/email]

[email][email protected][/email]

Basically, it's the best validator I've seen. I got it from a site a long time ago, don't remember where... actually, let me look in my code comments for I think I put a note there.

AH! Here it is: [URL=http://www.regexlib.com/REDetails.aspx?regexp_id=295]http://www.regexlib.com/REDetails.aspx?regexp_id=295[/URL]
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@ShrineDesignsJun 07.2005 — try/^[a-zA-Z0-9-_x7f-xff]+@[a-zA-Z0-9-_x7f-xff]+(.[a-zA-Z0-9x7f-xff]+)+$/
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@NogDogJun 07.2005 — From http://iamcal.com/publish/articles/php/parsing_email/pdf/ (well worth reading):
[code=php]
function is_valid_email_address($email) {
$qtext = '[^\x0d\x22\x5c\x80-\xff]';
$dtext = '[^\x0d\x5b-\x5d\x80-\xff]';
$atom = '[^\x00-\x20\x22\x28\x29\x2c\x2e\x3a-\x3c'.
'\x3e\x40\x5b-\x5d\x7f-\xff]+';
$quoted_pair = '\x5c\x00-\x7f';
$domain_literal = "\x5b($dtext|$quoted_pair)*\x5d";
$quoted_string = "\x22($qtext|$quoted_pair)*\x22";
$domain_ref = $atom;
$sub_domain = "($domain_ref|$domain_literal)";
$word = "($atom|$quoted_string)";
$domain = "$sub_domain(\x2e$sub_domain)*";
$local_part = "$word(\x2e$word)*";
$addr_spec = "$local_part\x40$domain";
return preg_match("!^$addr_spec$!", $email) ? 1 : 0;
}
[/code]
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@ShrineDesignsJun 07.2005 — nice one nogdog

preg_match() returns a boolean value so the ?: is not necessary
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@NogDogJun 08.2005 — nice one nogdog

preg_match() returns a boolean value so the ?: is not necessary[/QUOTE]
I didn't even notice the author did that. :rolleyes:
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