[wp-trac] [WordPress Trac] #34202: esc_url() cannot handle IPv6 literal URLs in PHP < 5.4.7

[WordPress Trac]

#34202: esc_url() cannot handle IPv6 literal URLs in PHP < 5.4.7
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 Reporter:  johnbillion                 |       Owner:
     Type:  defect (bug)                |      Status:  new
 Priority:  low                         |   Milestone:  Awaiting Review
Component:  Formatting                  |     Version:  3.1
 Severity:  normal                      |  Resolution:
 Keywords:  needs-patch has-unit-tests  |     Focuses:
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Comment (by swissspidy):

 Replying to [comment:4 dd32]:
 > Replying to [comment:3 swissspidy]:
 > > `esc_url` also breaks when an IPv6 address is used in a query arg,
 e.g. `http://example.org/?s=2001:0db8:0000:0000:0000:ff00:0042:8329`. It
 just returns an empty string in that case.
 >
 > I can't duplicate that under Trunk, does this also require the specific
 version of PHP?

 Just noticed that this happens when using a relative URL like `edit-
 comments.php?s=2001:0db8:0000:0000:0000:ff00:0042:8329`. In ''that'' case
 `esc_url()` returns an empty string. Not for `edit-
 comments.php?s=192.168.50.1` however. That works as expected.

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Ticket URL: <https://core.trac.wordpress.org/ticket/34202#comment:5>
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