How to Disable WordPress Search Function

This is the method to disable the search function of WordPress.

Add the following code to functions.php of your theme.

add_filter('get_search_form', function(){ return null; });
add_action('parse_query', function(){
	if (is_search() && !is_admin()) {
		header('Location: http://0.0.0.0/');
		exit;
	}
});

Search on the admin screen is enabled.