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Bug #50204 FILTER_VALID_EMAIL passes without top level domain
Submitted: 2009-11-17 16:01 UTC Modified: 2009-11-17 18:14 UTC
From: brian dot sulzen at aescreations dot com Assigned:
Status: Not a bug Package: Filter related
PHP Version: 5.2.11 OS: FreeBSD 6.3
Private report: No CVE-ID: None
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From: brian dot sulzen at aescreations dot com
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 [2009-11-17 16:01 UTC] brian dot sulzen at aescreations dot com
FILTER_VALIDATE_EMAIL is passes addresses with out top level domain (i.e., .com, .net, etc).

Reproduce code:
$email_address = "test2_mail@example";    
var_dump(filter_var($email_address, FILTER_VALIDATE_EMAIL));    
$email_address = "";    
var_dump(filter_var($email_address, FILTER_VALIDATE_EMAIL));    
$email_address = "";    
var_dump(filter_var($email_address, FILTER_VALIDATE_EMAIL));    

Expected result:
string(21) ""
string(21) ""

Actual result:
string(18) "test2_mail@example"
string(21) ""
string(21) "" 


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 [2009-11-17 16:06 UTC]
That's not a bug.  It only validates that the address looks valid, not whether the email address actually exists.  email addresses without a tld are perfectly valid.  Try sending an email to: root@localhost for example.  Or on my personal server rasmus@colo works.  Same for Intranet applications.  You can have all sorts of valid email addresses that have no TLD.
 [2009-11-17 18:14 UTC] brian dot sulzen at aescreations dot com
Was not sure if it was a bug or not. All I know is before the php 
portupgrade, addresses without a top level domain would not pass 
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