Читать книгу Professional WordPress Plugin Development - Brad Williams - Страница 79

Now that you know how to create a new option for your plugin, let's look at updating that option value. To handle this, you'll use the update_option()function. As an example, let's update the color of your new plugin setting from red to blue.

<?php update_option( 'pdev_plugin_color', 'blue' ); ?>

The update_option()function accepts the following parameters:

 option: Name of the option to update

 value: Value of the option you are updating

 autoload: Whether to load the option when WordPress starts

The difference between add_option() and update_option() is that the first function does nothing if the option name already exists, whereas update_option() checks if the option already exists before updating its value and creates it if needed.