update_option action-hook . WP 2.9.0

Fires immediately before an option value is updated.

Usage

add_action( 'update_option', 'action_function_name_3464', 10, 3 );
function action_function_name_3464( $option, $old_value, $value ){
	// action...
}

$option(string)

Name of the option to update.

$old_value(mixed)

The old option value.

$value(mixed)

The new option value.

Where the hook is called

do_action( 'update_option', $option, $old_value, $value );

Where the hook is used (in WP core)