Set Database Config On The Fly for Laravel Multi Tenant

filters.php

<?php

// app/filters.php

App::before(function($request)
{
    // get current host and replace . with _
    $host   = str_replace('.', '_', $request->getHost());

    // get current config based on $host
    $config = Config::get('sites/' . $host);

    // create global object from $config
    App::singleton('siteConfig', function() use ($host, $config){
        return json_decode(json_encode($config), FALSE);
    });

    if ( ! $config) {
        return App::abort('404');
    }

    // set database config on the fly
    Config::set('database.connections.currentHost', [
        'driver'    => $config['db']['driver'], 
        'host'      => $config['db']['host'], 
        'database'  => $config['db']['database'], 
        'username'  => $config['db']['username'], 
        'password'  => $config['db']['password'],
        'charset'   => $config['db']['charset'],
        'collation' => $config['db']['collation'],
        'prefix'    => $config['db']['prefix'],
    ]);

    // set default connection for this $host
    DB::setDefaultConnection('currentHost');
});