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PHP面向对象(一)

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Release： 2016-06-13 12:01:14
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PHP面向对象(1)
如果子类没有构造方法，就会调用父类的构造方法。如果子类有自己的构造方法，就会调用自己的构造方法。子类的构造方法覆盖了父类的构造方法。在静态方法里面使用this关键字会出错。

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