(PHP 5, PHP 7, PHP 8)
ReflectionExtension::__toString — To string
   Exports a reflected extension and returns it as a string. This 
   is the same as the ReflectionExtension::export() with 
   the return set to true.
  
Diese Funktion besitzt keine Parameter.
Returns the exported extension as a string, in the same way as the ReflectionExtension::export().
