PHP文件系统基本操作类

;     }
            }
            unset($fbuffer, $tbuffer, $fstats, $in_dq, $in_sq, $in_lc, $in_bc);
            rewind($fh); // 回移文件指针到文件首
            rewind($th);
            $i = $j = "";
            $k = 0;
            while (!feof($th)) { // 将临时文件数据写回源文件
                $i = fgets($th, $this->buffer_size);
                if ($j=="") { // 获得文件系统的换行符
                    $j= substr($i, -2);
                    if ($j=="\r\n") $k = 2;
                    elseif ($j=="\r"||$j=="\n") {
                        $k = 1;
                        $j = $j;
                    } else $j = "";
                }
                if (substr($i, -$k)==$j) {
                    $i = rtrim(substr($i, 0, -$k), " \t");
                    if (strlen($i)) fwrite($fh, $i.$j); // 清除右方空格
                    else continue;
                } else fwrite($fh, rtrim($i, " \t"));
            }
            fflush($fh); // 保存、关闭文件
            f