数组/类常量表达式包含无效操作 [英] Array/classes Constant expression contains invalid operations

问题描述

我不明白为什么这行不通:

I can't understand why this doesn't work:

class TestOne
{

    public static $TEST = array(
        "test" => array( "name" => TestTwo::$TEST2[ "test" ] ) // error line
)}

class TestTwo
{
    public static $TEST2 = array(
        "test" => "result"
    );
}

这给了我错误:

常量表达式包含无效的操作

Constant expression contains invalid operations

我希望TestOne::$TEST[ "test" ][ "name" ]包含结果"

推荐答案

常量标量表达式无法引用变量(因为它们不是常量).

Constant scalars expressions cannot reference variables (as they are not constant).

您必须以其他方式(例如通过静态访问器)初始化属性，或者完全避免使用公共静态属性.

You'll have to initialize the property some other way (e.g. through a static accessor) or avoid public static properties altogether.

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