php更新mysql后获取影响的行数发生异常解决方法_PHP教程

从manual上知道了mysql_affected_rows函数当UPDATE前后的数据一样时会返回异常值，

下面有个方便的解决办法，从官方munual上看到 bdobrica at gmail dot com 留言的：
As a solution to the problem pointed in the post reffering to mysql_affected_rows() returning 0 when you are making an update query and the fields are not modified although the query is valid, i'm posting the following function. It is very simple and based on a previous post.