ReflectionParameter
PHP Manual

ReflectionParameter::isCallable

(PHP 5 >= 5.4.0, PHP 7)

ReflectionParameter::isCallableReturns whether parameter MUST be callable

Description

public bool ReflectionParameter::isCallable ( void )

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.


ReflectionParameter
PHP Manual