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Bug #51192 FILTER_VALIDATE_URL will invalidate a hostname that includes '-'
Submitted: 2010-03-03 08:49 UTC Modified: 2012-07-26 18:58 UTC
Avg. Score:3.0 ± 0.0
Reproduced:1 of 1 (100.0%)
Same Version:1 (100.0%)
Same OS:1 (100.0%)
From: solar at azrael dot ws Assigned: aharvey (profile)
Status: Closed Package: Filter related
PHP Version: 5.2.13 OS: linux
Private report: No CVE-ID: None
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 [2010-03-03 08:49 UTC] solar at azrael dot ws
Hostname must contain only alpha-numeric letters and the hyphen(-).

Test script:

Expected result:
string(18) ""
string(19) ""

Actual result:
string(18) ""
string(19) ""


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 [2010-03-03 08:56 UTC] solar at azrael dot ws

Test script:

var_dump(filter_var('', FILTER_VALIDATE_URL));
var_dump(filter_var('', FILTER_VALIDATE_URL));
var_dump(filter_var('', FILTER_VALIDATE_URL));
 [2010-03-03 09:41 UTC] solar at azrael dot ws
Changes summary. That was too long.
 [2010-03-03 09:50 UTC]
-Status: Open +Status: Assigned
 [2010-03-03 09:50 UTC]
Yeah, that doesn't quite look right. :)

Cheers for the patch; I'll cook up a test script to go with it and commit it.
 [2010-03-03 10:25 UTC]
Automatic comment from SVN on behalf of aharvey
Log: Fix for bug #51192 (FILTER_VALIDATE_URL will invalidate a hostname that includes '-'). Original patch by
 [2010-03-03 10:26 UTC]
-Status: Assigned +Status: Closed
 [2010-03-03 10:26 UTC]
This bug has been fixed in SVN.

Snapshots of the sources are packaged every three hours; this change
will be in the next snapshot. You can grab the snapshot at
Thank you for the report, and for helping us make PHP better.

 [2010-04-06 22:04 UTC] lupo at e-noise dot com
I am experiencing the same behavior with PHP 5.3.2 on Mac OSX. When hostname contains hyphens filter_var() won't validate using the FILTER_VALIDATE_URL filter.

The test code posted by "solar at azrael dot ws" produces the following output:

string(18) ""
string(19) ""
 [2010-04-07 02:43 UTC]
The fix for this hasn't been incorporated into any stable releases yet: it came after 5.2.13 was released and 5.3.2 was branched (and far too late in 5.3.2's release cycle to be ported across).

Both versions 5.2.14 and 5.3.3 will include this bug fix.
 [2010-08-13 08:39 UTC]
Please be aware that IDN (PunyCode) url can contain two consecutive hyphens, ie.

is OK as well.
 [2010-08-13 08:49 UTC]
That also works as of 5.3.3 -- I actually own a couple of internationalised domains, so I'm aware of the issue. :)
 [2012-07-26 14:28 UTC] bd9161b68a85 at e89800344727 dot anonbox dot net
Can you please fix it after years of ignoring it?
 [2012-07-26 18:58 UTC]
Years of ignoring what? This was fixed years ago in PHP 5.3.3
 [2014-01-06 20:54 UTC] skedat at gmail dot com
php 5.4.4 on Windows this error still exists.
 [2015-08-21 17:18 UTC] rich at social5 dot com
This bug definitely still persists in PHP 5.5.19 on CentOS.
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