[wp-trac] [WordPress Trac] #30869: Output of `esc_url`

[WordPress Trac]

#30869: Output of `esc_url`
--------------------------+-----------------------------
 Reporter:  rabmalin      |      Owner:
     Type:  defect (bug)  |     Status:  new
 Priority:  normal        |  Milestone:  Awaiting Review
Component:  General       |    Version:  4.1
 Severity:  normal        |   Keywords:
  Focuses:                |
--------------------------+-----------------------------
 {{{
 $args = array(
  'autofocus[control]' => 'blogname',
 );
 $url = add_query_arg( $args, admin_url('customize.php' ));
 echo esc_url($url);
 }}}

 Current output:
 `http://staging.dev/wp-admin/customize.php?autofocuscontrol=blogname`

 Expected output:
 `http://staging.dev/wp-admin/customize.php?autofocus[control]=blogname`

 I was trying to generate auto focus URL for customize page. I generally
 use `esc_url` to escape any URL in WordPress. But I could not produce
 expected URL when URL is escaped with the function. Is this expected
 feature of the function? Can someone please help make me clear about this?
 Thanks.

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Ticket URL: <https://core.trac.wordpress.org/ticket/30869>
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