Parameters 
  - $args
-   (array) (Optional) Array of default arguments. Optional. 
- 
'network_id'
 (int|array) A network ID or array of network IDs. Set to null to retrieve sites from all networks. Defaults to current network ID.
- 
'public'
 (int) Retrieve public or non-public sites. Default null, for any.
- 
'archived'
 (int) Retrieve archived or non-archived sites. Default null, for any.
- 
'mature'
 (int) Retrieve mature or non-mature sites. Default null, for any.
- 
'spam'
 (int) Retrieve spam or non-spam sites. Default null, for any.
- 
'deleted'
 (int) Retrieve deleted or non-deleted sites. Default null, for any.
- 
'limit'
 (int) Number of sites to limit the query to. Default 100.
- 
'offset'
 (int) Exclude the first x sites. Used in combination with the $limit parameter. Default 0.
 
 Default value: array() 
Return 
 (array[]) An empty array if the installation is considered "large" via wp_is_large_network(). Otherwise, an associative array of WP_Site data as arrays.
      Source 
  File: wp-includes/ms-deprecated.php 
 function wp_get_sites( $args = array() ) {
	_deprecated_function( __FUNCTION__, '4.6.0', 'get_sites()' );
	if ( wp_is_large_network() )
		return array();
	$defaults = array(
		'network_id' => get_current_network_id(),
		'public'     => null,
		'archived'   => null,
		'mature'     => null,
		'spam'       => null,
		'deleted'    => null,
		'limit'      => 100,
		'offset'     => 0,
	);
	$args = wp_parse_args( $args, $defaults );
	// Backward compatibility.
	if( is_array( $args['network_id'] ) ){
		$args['network__in'] = $args['network_id'];
		$args['network_id'] = null;
	}
	if( is_numeric( $args['limit'] ) ){
		$args['number'] = $args['limit'];
		$args['limit'] = null;
	} elseif ( ! $args['limit'] ) {
		$args['number'] = 0;
		$args['limit'] = null;
	}
	// Make sure count is disabled.
	$args['count'] = false;
	$_sites  = get_sites( $args );
	$results = array();
	foreach ( $_sites as $_site ) {
		$_site = get_site( $_site );
		$results[] = $_site->to_array();
	}
	return $results;
}