[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 johnbillion):

 I suspect the above issue is caused by the relative URL handling in
 `esc_url()` which looks for the presence of a colon to determine whether
 it's a relative URL or not. That can go in its own ticket.

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Ticket URL: <https://core.trac.wordpress.org/ticket/34202#comment:6>
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