public static function sep()
    {
        if (static::$sep !== null) {
            return static::$sep;
        }

        if (defined('PHP_EOL')) {
            static::$sep = PHP_EOL;
        } else {
            static::$sep = (strpos(PHP_OS, 'WIN') === false) ? '\n' : '\r\n';
        }

        return static::$sep;
    }
public static function sep()
    {
        if (static::$sep !== null) {
            return static::$sep;
        }

        if (defined('PHP_EOL')) {
            static::$sep = PHP_EOL;
        } else {
            static::$sep = (strpos(PHP_OS, 'WIN') === false) ? '\n' : '\r\n';
        }

        return static::$sep;
    }
public static function sep ( ) { if ( static :: $ sep !== null ) { return static :: $ sep ; } if ( defined ( 'PHP_EOL' ) ) { static :: $ sep = PHP_EOL ; } else { static :: $ sep = ( strpos ( PHP_OS , 'WIN' ) === false ) ? '\n' : '\r\n' ; } return static :: $ sep ; }
sep, separator \r\n or \n

@return string
sep separator \ r \ n or \ n