Description:
------------
lost connection in oophp

so i have 3 object and 
every object wil get a connection to the database(not static)
every object has an __destruct and wil kill his $DB

Test script:
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<?php
    namespace users;
	class Overview_model extends \Model{
	    private $isinstalled =false;
        private $DB ;
	public function __construct() {
            $conn = new \DBmyConn();//mysqlconnection
            $this->DB = $conn->GET();
            $this->isinstalled = self::isInstalled();
	}
        public function __install(){
            
        }
        public function isInstalled(){
            return $this->isinstalled ||$this->existTableAccound();
        }

        private function existTableAccound(){
            $database = \DBConn::GET();//PDO=>mysql
            $dbResult = $database->query("SHOW TABLES LIKE '".\DBConn::getTableNameFor('accound')."'");
            return $dbResult->rowCount()==1 ;
        }
        public function save(){
            if(!$this->isinstalled){return false;}
            try {
                    $commit = true;
                    mysql_query("SET AUTOCOMMIT=0",$this->DB);
                    mysql_query("START TRANSACTION",$this->DB);
                    $sql[''] = "";
                    if(!mysql_query($sql[''])){     $commit = false;}
                    $sql[''] = "";
                    if(!mysql_query($sql[''])){     $commit = false;}
                   return ($commit)? mysql_query("COMMIT",$this->DB): mysql_query("ROLLBACK",$this->DB);
            }catch (PDOException $e) {
               @mysql_query("ROLLBACK",$this->DB);
               return false;
            }
        }
        public function __destruct() {
            @$this->DB->close();// this wil kill al other connections 
             //of new \DBmyConn()
            $this->DB=null;
        }
        public function killcon(){
             mysql_query("ROLLBACK",$this->DB);
             $this->__destruct();
        }

        public function getModelInfo(){
            return "UsersOverview.model.info";
        }
        public function getVersionNr(){
            return (float)3.0;
        }
    }
?>

Expected result:
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so You can not see anything it is a part of prototype of a cms autosite