[wp-trac] [WordPress Trac] #42925: register_setting backwards compatibility when function defined after registration

[WordPress Trac]

#42925: register_setting backwards compatibility when function defined after
registration
--------------------------+-----------------------------
 Reporter:  ItayXD        |      Owner:
     Type:  defect (bug)  |     Status:  new
 Priority:  normal        |  Milestone:  Awaiting Review
Component:  General       |    Version:  4.9.1
 Severity:  normal        |   Keywords:
  Focuses:                |
--------------------------+-----------------------------
 to make register_setting backward compatible this code is used:

 {{{
     if ( is_callable( $args ) ) {
         $args = array(
             'sanitize_callback' => $args,
         );
     }
 }}}
 so if you call register_setting with a function instead of args, and only
 then define that function is_callable returns false, and the function is
 never passed.

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Ticket URL: <https://core.trac.wordpress.org/ticket/42925>
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