Community Learn Tools Library Leisure
search
English
Home > Backend Development > PHP Tutorial > body text

为啥在连接数据库的时候要销毁这么多呢

WBOY
Release： 2016-06-23 13:46:52
Original
1031 people have browsed it

好象在连接数据库后要销毁连接，要销毁结果集，还要销毁对象句柄为啥要这样做


回复讨论(解决方案)

php 程序不是驻留内存的，用完就丢，不可复用
所以他占用的系统资源应该释放
不过 php 内置有垃圾回收机制，你不释放的话，他会替你释放

php 可以不用手动销毁 但是养成一个良好的编程习惯是最重要的！

php 程序不是驻留内存的，用完就丢，不可复用
所以他占用的系统资源应该释放
不过 php 内置有垃圾回收机制，你不释放的话，他会替你释放


即然不驻留内存，即，用完了就没了，那还释放它做啥呢？不是多吃一举吗？

因为数据库是系统资源（不是php自己的）不释放，别人就不能用

Related labels：
为啥在连接数据库的时候要销毁这么多呢
source：php.cn
Previous article：PHP输出的奇怪问题阿！求大神帮忙看看我看了一天没看懂哪里来的奇怪字符 Next article：两个数组合并问题
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Latest Articles by Author
Latest Issues
function_exists() cannot determine the custom function Function test () {return true;} if (function_exists ('test')) {echo "test is function...
From 2024-04-29 11:01:01
0
2
1842
How to display the mobile version of Google Chrome Hello teacher, how can I change Google Chrome into a mobile version?
From 2024-04-23 00:22:19
0
10
2014
The child window operates the parent window, but the output does not respond. The first two sentences are executable, but the last sentence cannot be implemented.
From 2024-04-19 15:37:47
0
1
1695
There is no output in the parent window document.onclick = function(){ window.opener.document.write('I am the output of the child ...
From 2024-04-18 23:52:34
0
1
1596
Where is the courseware about CSS mind mapping? Courseware
From 2024-04-16 10:10:18
0
0
1613
Related Topics
More>
Popular Recommendations
Popular Tutorials
More>
Related Tutorials
Popular Recommendations
Latest courses
Latest Downloads
More>
Web Effects
Website Source Code
Website Materials
Front End Template