简体中文(ZH-CN) English(EN) 繁体中文(ZH-TW) 日本語(JA) 한국어(KO) Melayu(MS) Français(FR) Deutsch(DE)
Home > Backend Development > PHP Tutorial > body text

静态方法调用等价于new对象吗解决方法

WBOY
Release： 2016-06-13 12:19:18
Original
1266 people have browsed it

静态方法调用等价于new对象吗
看别人写的一个例子,似乎使用了静态调用后,就等价于new了一个对象了,不过从道理上怎么也没有理解
这到底是为什么呢

------解决思路----------------------
getDB里面实现了new 实例，返回的就是一个实例，所以就能用query()
静态方法是常驻内存的，调用要快一点，但是里面不能用 $this ，因为只有 new 实例以后才能用 $this
------解决思路----------------------
DB::getDB() 返回了一个 DB 的实例
你看看 getDB 方法的定义就清楚了

Related labels：
nbsp new query this
source：php.cn
Previous article：关于用户登录跟检测,每次都要进行数据库查询判断吗 Next article：使用var_dump打印出现有关问题
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
1429
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
1284
PX automatic conversion to REM error  <style>html {   font-size: calc(100vw / 3.75);      }...
From 2024-04-16 09:34:16
0
0
4687
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
About us Disclaimer Sitemap
php.cn：Public welfare online PHP training，Help PHP learners grow quickly！