一次编写，随处运行

lynx -source go-pear.org|php

After completing the installation process you simply need to type one more command and you are all set.
在安装完成之后你只需要再输入一行命令那么就全部搞定了。

pear install MDB

If the above does not work for you there is always the option of getting the package directly from the PEAR MDB homepage. The URL is listed at the bottom of the article.
如果前面的过程对你来说不管用，总是有从 PEAR MDB 主页中直接获得包的选项。URL 列于文章的最后。

Making use of data type abstraction
利用数据类型抽象

Since most databases tend to have some specialities or quirks it is important for MDB to hide these differences from the developer. MDB achieves this by defining its own internal data types: text, boolean, integer, decimal, float, date, time, time stamp, large objects (files). All data that is passed to and from the database may be converted from MDB''s internal format to the databases internal format. The accompanying example scripts to this section can be found in the datatype directory. Let us look at the following query:
因为大部分数据库倾向于有一些个性或者怪癖，对于MDB来说把这些不同之处给开发者隐藏起来非常重要。MDB 通过定义自己的内部数据类型来达到这点：text，boolean，integer，decimal，float，date，time，time stamp，large objects（文件）。所有传递给数据库和从数据库获取的数据都能转换成 MDB 的内部格式或者从数据库的内部格式转化回来。本节相关的例子脚本能够再 datatype 目录中找到。让我们看看下面的查询：

$session = ''098f6bcd4621d373cade4e832627b4f6'';
// set time out to 30 minutes
$timeout = time()+60*30;
// SELECT query showing how the datatype conversion works
$query = ''SELECT createtime, user_id FROM sessions'';
$query .= '' WHERE session = ''.$session;
$query .= '' AND lastaccess < ''.$timeout;

This query will most likely fail if it were send to a database. The reason being that the value stored in $name would need to be converted to the correct string format. This would mean the contents of $name would have to have special characters escaped and quotes placed around. PEAR DB provides the method DB:.quote() for this. In MDB the method is called MDB::getTextValue(). The difference is that MDB offers such a method for every data type listed above. So we can also convert $timeout to the correct format.
这个查询如果发送给数据库的话八成要失败。原因是存储在 $name 中的值需要转换为正确的字符串格式。这也许意味着 $name 的内容可能有特殊的转义字符或者被引号包围。PEAR DB 为此提供了方法 DB:.quote()。在 MDB 中这个方法叫 MDB::getTextValue()。不同之处是 MDB 给每种前面所列的数据类型都提供了这样的函数。因而我们也能够把 $timeout 转换为正确的格式。

// convert $timeout to the MDB timestamp format
$timeout = MDB_date::unix2Mdbstamp($timeout);
// SELECT query

凌众科技专业提供服务器租用、服务器托管、企业邮局、虚拟主机等服务，公司网站：http://www.lingzhong.cn 为了给广大客户了解更多的技术信息，本技术文章收集来源于网络,凌众科技尊重文章作者的版权，如果有涉及你的版权有必要删除你的文章，请和我们联系。以上信息与文章正文是不可分割的一部分,如果您要转载本文章,请保留以上信息，谢谢!