在现在中小型网站的实际开发中，连接MySQL数据库主要使用哪种计算啊
是传统的 mysql函数
还是 mysqli函数
还是PDO接口的方法啊。
这三种方法各有什么特点和适用情况啊
另外：我想问一点：
设置字符集，严格的来说，字符集名称是否该用引号引起来，我觉得字符集名是个字符串常量，引起来好些吧，比如执行速度方面。
mysql_query("set names 'gb2312'");
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