php zip文件解压类代码

                        continue;
                    }
                    if ( $path==""||is_dir($path) ){
                        if ( $path=="" ){
                            if ( substr(PHP_OS, 0, 3)=="WIN" ){
                                $path = $dirpath_a[$i];
                            }
                            else {
                                $path .= "/".$dirpath_a[$i];
                            }
                        }
                        else {
                            $path .= "/".$dirpath_a[$i];
                        }
                        if ( is_dir($path) ){
                            continue;
                        }
                        else {