[wp-trac] [WordPress Trac] #34659: Whitelist for validation functions which only accept one argument

[WordPress Trac]

#34659: Whitelist for validation functions which only accept one argument
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 Reporter:  danielbachhuber  |       Owner:  rmccue
     Type:  enhancement      |      Status:  assigned
 Priority:  normal           |   Milestone:  Future Release
Component:  REST API         |     Version:
 Severity:  normal           |  Resolution:
 Keywords:  has-patch        |     Focuses:
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Comment (by brianhogg):

 @joshlevinson the decision on `_single_arg` was that a) people would
 likely either want just the value or the three params and b) its not
 really clear what passing "2" would do or passing
 `sanitize/validate_callback_args` with a value greater than 3
 (error/warning?  no effect?)

 If there's a case we missed where one would just want 2 args passed
 without using an anonymous function for the callback (ie. value and the
 request object, but without the key) could go with the args count
 approach?

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Ticket URL: <https://core.trac.wordpress.org/ticket/34659#comment:25>
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