is_user_option_local() WordPress Function

The is_user_option_local() function checks whether a user option has a local value. This function is useful for checking if a user has set an option value locally, as opposed to having the option value be set by a network administrator. Returns true if the user option has a local value, false otherwise.

is_user_option_local( string $key, int $user_id, int $blog_id ) #

function is_user_option_local( $key, $user_id = 0, $blog_id = 0 ) {
	global $wpdb;

	_deprecated_function( __FUNCTION__, '4.9.0' );

	$current_user = wp_get_current_user();
	if ( $blog_id == 0 ) {
		$blog_id = get_current_blog_id();
	}
	$local_key = $wpdb->get_blog_prefix( $blog_id ) . $key;

	return isset( $current_user->$local_key );
}