PHP文件系统基本操作类

;            if ($this->exist_dir=="") $this->exist_dir = $path; // 记录最后存在的目录路径
                    if (!@mkdir($path)) return $this->error_occur(0x0003, substr($path, 0, strrpos($path, DIRECTORY_SEPARATOR)));
                }
            }
            if ($this->exist_dir=="") $this->exist_dir = $path;
            return TRUE;
        }

        /**
         * @]Method Name[= verify_file()
         * @]Purpose[=
         *     使用 MD5 算法比较两个文件是否相同
         * @]Parameter[=
         *     string $src 源文件路径
         *     string $dst 目标文件路径
         *     boolean $interal 对于超过 1MB 文件，设置 FALSE 省去 MD5 检验步骤，减轻服务器负担
         * @]Return[= boolean 错误返回 FALSE，否则 TRUE
         * @]Author[= SNakeVil <51JS,BU,PHPx> (snakevil@qq.com)
         * @]See[=
         */
        function verify_file($src="", $dst="", $interal=TRUE) {
            if (!is_file($src)||!is_file($dst)) return $this->error_occur(0x000B, __FUNCTION__);
            if (!is_readable($src)) return $this->error_occur(0x0006, $src);
            if (!is_readable($dst)) return $this->error_occur(0x0006, $dst);
            $i = filesize($src);
            if (filesize($dst)!=$i) { // 文件大小不等
                unset($i);
                return FALSE;
            }
&nb