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php类的成员变量没有声明解决思路

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Release: 2016-06-13 11:40:00
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php类的成员变量没有声明

<br />class test{<br />    private $name;<br />    private $sex;<br />    function __construct(){<br />        $this->aaa='aaa';<br />    }<br />}<br /><br />$test=new test();<br /><br />$reflect=new ReflectionClass($test);<br />$pro=$reflect->getDefaultProperties();<br />print_r($pro);//打印结果:Array ( [name] => [sex] => )<br /><br />echo $test->aaa;//打印结果:aaa<br />
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在这个test类中,声明了两个成员变量$name和$sex,但是在构造函数中,又声明了一个变量$aaa,初始化类,使用反射类打印默认成员属性只有声明的两个成员变量属性,但是打印类的$aaa变量发现还是可以输出结果。

请问类的成员变量不用声明,在函数中声明也是可以的吗,有什么区别?

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