What functions in PHP can be used to register a shutdown function or set an error handler to handle unexpected errors?

To register a shutdown function or set an error handler in PHP, you can use the following functions: 1. register_shutdown_function(): This function registers a callback to be executed when the script finishes execution. 2. set_error_handler(): This function sets a user-defined error handler function to handle errors and warnings. By using these functions, you can ensure that your script gracefully handles unexpected errors and executes cleanup tasks before exiting.

// Register a shutdown function
register_shutdown_function(function() {
    // Cleanup tasks or final actions here
});

// Set an error handler
set_error_handler(function($errno, $errstr, $errfile, $errline) {
    // Handle errors here
});

// Your PHP code goes here