ReflectionParameter::allowsNull
  Checks if null is allowed
  
 
  Description
  
   public bool ReflectionParameter::allowsNull()
  
  
 
  Parameters
  This function has no parameters.
  
 
  Return Values
  
   true if null is allowed, otherwise false
  
  
 
  See Also
  
   
    -  ReflectionParameter::isOptional