How can i disable auto save & revisions with `function.php` in wordpress?

Question

I need disable auto save & revisions with function.php in wordpress. What should I do? thanks

Answer 1

define('WP_POST_REVISIONS', false);
function disable_autosave() {
    wp_deregister_script('autosave');
}
add_action('wp_print_scripts', 'disable_autosave');

Simple method