"Internal" helper functions...

[n8grndr1087]

is there any way to write helper functions so that they only can be called in the file's scope? (not by anything including the file or included by the file)

[NogDog]

function example()
{
   // need backslash conversion for Windows systems
   if(str_replace('\\', '/', __FILE__) != $_SERVER['SCRIPT_FILENAME'])
   {
      user_error("example(): included calls not allowed", E_USER_WARNING);
      return(FALSE);
   }
   // rest of function...
}