ISPcfg3 WHMCS module enhancement

I changed some code in the ISPcfg3 module because I have multiserver setup with multiple mail servers and I wanted to add mail server for a new user to the server with the least amount of mailboxes in the hope of load balancing my mail servers like I do now with the web servers. I simply lifted the code from cwispy's latest addon and modified it to count mailboxes on each mailserver instead of websites.

PHP:

 if (count( $server['mail_server'] ) == 1 ) {
           
            $defaultmailserver = $server['mail_server'][0]['server_id'];
           
        } else {
           
           /*
         $rnd = rand(0, ( count( $server['mail_server'] ) - 1 ) );
            $defaultmailserver = $server['mail_server'][$rnd]['server_id'];
        */

          /* Andy added this to choose mail server with least amount of mail accounts    */

            $a = 1;
            $b = 0;
                   
            while ( $a <= count($server['mail_server']) ) {
           
                $result = array();
                $result = $client->mail_user_get( $session_id,
                    array( 'server_id' => $server['mail_server'][$b]['server_id'],
                            'homedir' => '/var/vmail') );
               
                if (!isset($mailboxcnt)) {
                    $mailboxcnt = count( array_keys($result) );
                   
                }
               
                if ( $mailboxcnt > count( array_keys($result) ) OR
                    ( !isset($defaultmailserver) ) ) {
                       
                    $mailboxcnt = count( array_keys($result) );
                    $defaultmailserver = $server['mail_server'][$b]['server_id'];
               
             }
             $a++;
             $b++;
           
            }
           
            unset($a);
            unset($b);

          
        }