private function initialize($file)
    {
        if (file_exists($file)) {
            $this->file = realpath($file);
            return false;
        }
        file_put_contents($file, '');
        $this->file = realpath($file);
        return true;
    }
private function initialize($file)
    {
        if (file_exists($file)) {
            $this->file = realpath($file);
            return false;
        }
        file_put_contents($file, '');
        $this->file = realpath($file);
        return true;
    }
private function initialize ( $ file ) { if ( file_exists ( $ file ) ) { $ this -> file = realpath ( $ file ) ; return false ; } file_put_contents ( $ file , '' ) ; $ this -> file = realpath ( $ file ) ; return true ; }
Initializes the database for work.

@param string $file  the relative path of the database file
@return bool         true if the database was newly created, otherwise false
Initializes the database for work .