[wp-trac] [WordPress Trac] #34105: kses strips tags with hyphens in the name

[WordPress Trac]

#34105: kses strips tags with hyphens in the name
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 Reporter:  batmoo        |      Owner:
     Type:  defect (bug)  |     Status:  new
 Priority:  normal        |  Milestone:  Awaiting Review
Component:  Formatting    |    Version:  trunk
 Severity:  normal        |   Keywords:
  Focuses:                |
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 The W3C Custom Elements spec (http://www.w3.org/TR/custom-
 elements/#concepts) allows you to use your own custom DOM elements/tags.
 One of the main requirements is that the tag name "must contain a U+002D
 HYPHEN-MINUS character".

 However, kses does not currently factor in the hyphen and strips out tags,
 even if they're set to be explicitly allowed:

 {{{
 $string = '<hyphenated-tag>Hello</hyphenated-tag>';
 wp_kses( $string, array( 'hyphenated-tag' => array() ) );

 // returns 'Hello' but should be '<hyphenated-tag>Hello</hyphenated-tag>'
 }}}

 This is because the regex for parsing the element name within kses only
 allow alphanumerics. It would be nice if this was loosened to allow
 hyphens in the tag name.

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Ticket URL: <https://core.trac.wordpress.org/ticket/34105>
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