(PHP 3>= 3.0.4, PHP 4 )
register_shutdown_function -- 
     Register a function for execution on shutdown
    
Description
int 
       register_shutdown_function
       (string func)
     Registers the function named by func to be
     executed when script processing is complete.
     Common Pitfalls:
    
     Since no output is allowed to the browser in this function, you
     will be unable to debug it using statements such as print or
     echo.