[wp-trac] [WordPress Trac] #19986: Issue with add_filter() and add_action() when using anonymous functions.

[WordPress Trac]

#19986: Issue with add_filter() and add_action() when using anonymous functions.
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 Reporter:  pagesimplify  |       Owner:
     Type:  defect (bug)  |      Status:  new
 Priority:  normal        |   Milestone:  Awaiting Review
Component:  Plugins       |     Version:  3.3.1
 Severity:  minor         |  Resolution:
 Keywords:  has-patch     |
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Comment (by SergeyBiryukov):

 Anonymous function names indeed start with a null character, in order to
 ensure they don't clash with user-defined functions:

 * https://bugs.php.net/bug.php?id=10721
 * https://bugs.php.net/bug.php?id=40160

 That said, null is also a valid array key (will evaluate to an empty
 string):[[BR]]
 http://www.php.net/manual/en/language.types.array.php#30132

 Both of these examples seem to work:
 {{{
 $foo = array( null => 'bar' );
 echo $foo[''];

 $foo = array( chr(0) . 'key' => 'bar' );
 echo $foo[ chr(0) . 'key' ];
 }}}

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Ticket URL: <http://core.trac.wordpress.org/ticket/19986#comment:3>
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