php更新mysql后获取改变行数的方法_php技巧

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Release: 2016-05-16 20:27:11
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本文实例讲述了php更新mysql后获取改变行数的方法。分享给大家供大家参考。具体分析如下:

一个php更新mysql后获取改变的行数,在php中提供mysql函数来获取最后执行查询所影响的记录数:mysql_affected_rows(), 返回最近一次与 连接句柄 关联的 INSERT,UPDATE 或 DELETE 查询所影响的记录行数.FOUND_ROWS() : select ROW_COUNT():update delete insert.

下面就是文章的主要内容描述,代码如下:

复制代码 代码如下:
found_rows():select
row_count(): update delete insert

注:需要配合相应的操作一起使用,否则返回的值只是1和-1(都是不正确的值)

php示例代码如下:

复制代码 代码如下:
drop database if exists `mytest`; 
create database `mytest`; 
use `mytest`;
drop table if exists `MyTestTable`; 
create table `MyTestTable`(`ID` int ,`Name` varchar(10));
insert into `MyTestTable`(`ID`,`Name`) 
select '1','role1' union all 
select '2','role2' union all 
select '3','role3'; 
select row_count(); -- 输出3(返回新添加的记录数),[注:如果使用insert into...values只返回1]
select * from `MyTestTable`;select found_rows(); -- 输出3(返回选择的行数) 
update `MyTestTable` set `Name`='people';select row_count(); -- 输出3(返回修改的行数) 
delete from `MyTestTable`;select row_count(); -- 输出3(返回删除的行数)

php更新mysql后获取影响的行数发生异常解决,代码如下:
复制代码 代码如下:
function mysql_modified_rows () { 
        $info_str = mysql_info(); 
        $a_rows = mysql_affected_rows(); 
        ereg("Rows matched: ([0-9]*)", $info_str, $r_matched); 
        return ($a_rows }

希望本文所述对大家的php程序设计有所帮助。

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