​The `add_option()` function in WordPress is used to add a new option to the database, which can be accessed later through the `get_option()` function

​The `add_network_option()` function in WordPress allows developers to add custom network options by passing in a `$network_id` parameter along with the option name and value

​The `add_blog_option()` function in WordPress allows adding options to a specific blog or to all blogs on the site

​The `delete_transient()` function in WordPress removes a specific transient from the options table

​The `delete_site_transient()` function in WordPress removes a site transient from the database, which is temporary data stored across an entire network on a multisite installation

​The `delete_site_option()` function is a WordPress PHP function used to remove a specific option by its name for the current network

​The `check_column()` function in WordPress allows developers to check if a specific column in a database table meets certain criteria

​The `add_site_option()` function in WordPress allows you to add a new option for your website's network

Adds slashes to a string or recursively adds slashes to strings within an array.