是否需要mysql_close和pg_close? [英] Are mysql_close and pg_close required?
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问题描述
可能重复:
使用mysql_close()
是否需要mysql_close和pg_close?
Are mysql_close and pg_close required ?
在某些脚本中没有...为什么?
In some script there aren't... why ?
如果我不使用它会发生什么?
What happen if I don't use its ?
推荐答案
如果不调用它,则与数据库的套接字连接在等待状态下保持打开状态约30秒。
If you don't call it, the socket connection to the database remains open for ~30 seconds in a wait state.
如果您有很多人,并且您无法以某种方式设法重用这些僵尸连接,则数据库可能因用户错误而爆炸。
If you get lots and lots of people and you don't somehow manage to reuse these zombie connections, your database might explode with a too many users error.
因此,回答您的问题:语法上不需要,但是不包含它们是非常差的做法。
So in answer to your question: syntactically not required but it's very poor practice not to include them.
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