Description
The mainwp_getsites filter may be used to retrieve information about the child sites added to MainWP.

Usage

$sites = apply_filters('mainwp-getsites', $pluginFile, $childKey, $siteId);

Parameters
$pluginFile
(string) (required) The pluginfile is required here, mostly __FILE__
$childKey
(string) (required) The child-key is required here, how to retrieve your child key is explained here
$siteId
(integer) (optional) The id of the child-site you wish to retrieve

Return Values
(array)
An array which contains an array per child-site with the following keys: id, url, name

Usage Examples
Display the number of child-sites:

$sites = apply_filters('mainwp_getsites', __FILE__, $childKey);
echo 'Number of childsites: ' . count($sites);

Display the information of a specific child site:

$id = 3;
$sites = apply_filters('mainwp_getsites', __FILE__, $childKey, $id);
if ( count( $sites ) == 0 ) {
  echo 'No site with id '. $id . ' found';
}
else {
  echo 'Site id: ' . $sites[0]['id'] . '<br />';
  echo 'Site name: ' . $sites[0]['name'] . '<br />';
  echo 'Site url: ' . $sites[0]['url'] . '<br />';
}

Display the information of all child sites:

$sites = apply_filters('mainwp_getsites', __FILE__, $childKey);
foreach ($sites as $site) {
  echo 'Site id: ' . $site['id'] . '<br />';
  echo 'Site name: ' . $site['name'] . '<br />';
  echo 'Site url: ' . $site['url'] . '<br />';
}