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eecjimmy
V2EX    PHP

PHP 的 getter

  •  
  •   eecjimmy Mar 30, 2021 2662 views
    This topic created in 1857 days ago, the information mentioned may be changed or developed.
    <?php /** * Class Person */ class Person { public function getName1() { static $name = false; if ($name === false) { $name = "张三"; } return $name; } private $_name = false; public function getName2() { if ($this->_name === false) { $this->_name = "张三"; } return $this->_name; } } 

    在不考虑其他情况下,getName1getName2可有区别??

    9 replies    2021-03-30 19:00:39 +08:00
    JKeita
        1
    JKeita  
       Mar 30, 2021
    第一种情况,很可能被人喷。
    eason1874
        2
    eason1874  
       Mar 30, 2021   1
    getName2 是设为内部值,内部其他方法还是可以改的,重新实例化 Person 也会重置它。

    getName1 是把值存起来了,改不了了,就算你重新实例化 Person 也改不了了。
    justseemore
        3
    justseemore  
       Mar 30, 2021
    @JKeita 不会被人喷。。估计会被人打。。
    InternetExplorer
        4
    InternetExplorer  
       Mar 30, 2021   1
    第一种会增加以后找 bug 的时间
    FaceBug
        5
    FaceBug  
       Mar 30, 2021
    getName1

    直接 return '张三'就好了,整一堆没用的活儿
    dushixiang
        6
    dushixiang  
       Mar 30, 2021
    有种 95 年咖啡的味道
    CodeCodeStudy
        7
    CodeCodeStudy  
       Mar 30, 2021
    函数内部的 static 就是个黑箱子,外面是看不到里面的,而且函数退出后该 static 变量依然存在。
    Rache1
        8
    Rache1  
       Mar 30, 2021
    一个属于实例,一个属于全局
    CODEWEA
        9
    CODEWEA  
       Mar 30, 2021
    变量属于函数,变量属于类
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