PHP5。将数组声明为类成员的两种方法 [英] PHP5. Two ways of declaring an array as a class member

问题描述

当声明数组为类成员时，应该采用哪种方法？

When declaring an array as a class member, which way should it be done?

class Test1 {
    private $paths = array();

    public function __construct() {
        // some code here
    }
}

或

class Test2 {
    private $paths;

    public function __construct() {
        $this->paths = array();
        // some code here
    }
}

在良好做法和性能方面更好吗？

Which one is better in terms of good practices and performance? What would you recommend?

推荐答案

我建议在声明类变量时这样做。构造函数可以在扩展类中覆盖，如果任何函数依赖于这个变量是一个数组（甚至是一个空数组），那么可能会导致E_NOTICEs甚至E_WARNING。

I'd suggest doing this when declaring a class variable. A constructor can be overriden in extending classes, which might result in E_NOTICEs or even E_WARNINGs if any of your functions depend on this variable being an array (even an empty one)

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