config database and domains in ./config/config.php
$dbConfig = [
"DB_CONNECTION" => "mysql",
"DB_HOST"=>"127.0.0.1",
"DB_PORT"=>3306,
"DB_DATABASE"=>"testtenancy",
"DB_USERNAME"=>"root",
"DB_PASSWORD"=> "",
];
$domainConfig = [
"APP_URL" => '',
"CENTRAL_DOMAIN" => ''
];
access current subdomain in index.php
$subdomain = $tenancy->currentSubdomain();
create a tenant in index.php
$tenancy->createTenant($dbConfig['DB_DATABASE'].'_'.$subdomain);
switch to tenant database in index.php
$db->switchTenant($dbConfig['DB_DATABASE'].'_'.$subdomain);