几个php基础但是书上没找到的问题
看见很多框架里面有些代码前面加上两个下划线，比如 __isset, __construct等等，是不是在自定义函数前面也能加两个下划线？两个下划线有什么作用？
还有一个写法是 _e ，这是什么？？
这些都不是基础编程里的吧？我在基础教程里都没见到过??
各位大大教教我呗
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搜索:php 魔术方法
------解决方案--------------------
加不加下划线没有实际影响，只是让初学者不要去这么命名，避免可能会和自带的方法产生冲突。
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上面两个是魔术方法，下面一个应该是框架自定义的方法
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