Apparently this does not return true for callback arguments to many of the internal functions, such as array_map and array_walk.
ReflectionParameter::isCallable
(PHP 5 >= 5.4.0, PHP 7)
ReflectionParameter::isCallable — Returns whether parameter MUST be callable
Description
public ReflectionParameter::isCallable
( void
) : bool
Warning
This function is currently not documented; only its argument list is available.
Parameters
This function has no parameters.
Return Values
Returns TRUE if the parameter is callable, FALSE if it is
not or NULL on failure.
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3 years ago
