php 获取数据库最大的id几种方法
今天在个数据库类时一直都没法获取最后保存数据的ID了,经过反复排查还是没找到原因,不过后来总结了一些查找出mysql指定表中最后一条记录的ID或直接是说最新插入记录的ID,下面一起来看看。
开发什么的最喜欢了。写程序可以提高实力又可以收藏一些代码!的确很是不错。由于某些原因需要获取数据库最大的id值。所以出现了这段php 获取数据库最大的id代码了。这里面的max(id) 这里面的id 就是要获取最大的id了。如果是别的字段请填写为其他字段
方法一
$fh = mysql_query("select MAX(id) from log"); $c_echo = mysql_fetch_array($fh); echo $c_echo;
方法二
<?php //执行插入数据库的语句 $getID=mysql_insert_id();//$getID即为最后一条记录的ID ?>
PHP 函数 mysql_insert_id() 是返回在最后一次执行了 INSERT 查询后,由 AUTO_INCREMENT 定义的字段的值。
方法三
msyql_query("select last_insert_id()");
last_insert_id() 是mysql 一个函数 也是 对当前链接起效
此用法 解决了 mysql_insert_id () 中遇到的 bigint 型问题
教程地址:
欢迎转载!但请带上文章地址^^

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