Programming PHP, 2nd Edition

Name

register_shutdown_function

Synopsis

void register_shutdown_function(string function)

Registers a shutdown function. The function is called when the page completes processing. You can register multiple shutdown functions, and they will be called in the order in which they were registered. If a shutdown function contains an exit command, functions registered after that function will not be called.

Because the shutdown function is called after the page has completely processed, you cannot add data to the page with print( ), echo( ), or similar functions or commands.