The END blocks are the last thing to be evaluated. They are even evaluated after exit() or die() functions are called. Therefore, they can be used to close files or write messages to log files. Multiple END blocks are evaluated in reverse order.
END {
print("main\n");
}
package Foo;
END {
print("Foo\n");
}
This program displays:
Foo Main
Note Signals that are sent to your script can bypass the END blocks. So, if your script is in danger of stopping due to a signal, be sure to define a signal-handler function. See Chapter 13, "Handling Errors and Signals," for more information.