ReflectionFunction::getClosure
  (PHP 5 >= 5.4.0, PHP 7)
ReflectionFunction::getClosure — Returns a dynamically created closure for the function
  
 
  说明
  
   public ReflectionFunction::getClosure
    ( 
void
   ) : 
Closure 
  
  
  
 
 
  返回值
  
   Returns Closure.
   Returns NULL in case of an error.