在我页面的页脚中,我想添加诸如上次更新 xx/xx/200x"之类的内容,此日期是某个 mySQL 表的最后一次更新时间.
In the footer of my page, I would like to add something like "last updated the xx/xx/200x" with this date being the last time a certain mySQL table has been updated.
最好的方法是什么?是否有检索上次更新日期的功能?每次需要这个值时都应该访问数据库吗?
What is the best way to do that? Is there a function to retrieve the last updated date? Should I access to the database every time I need this value?
在更高版本的 MySQL 中,您可以使用 information_schema
数据库来告诉您另一个表何时更新:
In later versions of MySQL you can use the information_schema
database to tell you when another table was updated:
SELECT UPDATE_TIME
FROM information_schema.tables
WHERE TABLE_SCHEMA = 'dbname'
AND TABLE_NAME = 'tabname'
这当然意味着打开与数据库的连接.
This does of course mean opening a connection to the database.
另一种选择是在更新 MySQL 表时触摸"特定文件:
An alternative option would be to "touch" a particular file whenever the MySQL table is updated:
关于数据库更新:
O_RDRW
模式打开时间戳文件关闭
再次O_RDRW
modeclose
it again或者替代
touch()
,与 utimes()
函数等效的 PHP 函数,用于更改文件时间戳.touch()
, the PHP equivalent of the utimes()
function, to change the file timestamp.页面显示:
stat()
回读文件修改时间.stat()
to read back the file modification time.这篇关于如何判断 MySQL 表的上次更新时间?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持html5模板网!