我觉得好迷糊啊

PHP code

<?phpclass cA{    /**     * Test property for using direct default value     */    protected static $item = 'Foo';        /**     * Test property for using indirect default value     */    protected static $other = 'cA';        public static function method()    {        print self::$item."\r\n"; // It prints 'Foo' on everyway... :(        print self::$other."\r\n"; // We just think that, this one prints 'cA' only, but... :)    }        public static function setOther($val)    {        self::$other = $val; // Set a value in this scope.    }}class cB extends cA{    /**     * Test property with redefined default value     */    protected static $item = 'Bar';        public static function setOther($val)    {        self::$other = $val;    }}class cC extends cA{    /**     * Test property with redefined default value     */    protected static $item = 'Tango';        public static function method()    {        print self::$item."\r\n"; // It prints 'Foo' on everyway... :(        print self::$other."\r\n"; // We just think that, this one prints 'cA' only, but... :)    }        /**     * Now we drop redeclaring the setOther() method, use cA with 'self::' just for fun.     */}class cD extends cA{    /**     * Test property with redefined default value     */    protected static $item = 'Foxtrot';        /**     * Now we drop redeclaring all methods to complete this issue.     */}cB::setOther('cB'); // It's cB::method()!cB::method(); // It's cA::method()!cC::setOther('cC'); // It's cA::method()!cC::method(); // It's cC::method()!cD::setOther('cD'); // It's cA::method()!cD::method(); // It's cA::method()!/** * Results: -> * Foo * cB * Tango * cC * Foo * cD *  * What the hell?! :) */?>

这是覆盖，还是什么啊？为什么输出这样啊，不能理解啊，听乱的啊。

[解决办法]
这叫什么呢？自找麻烦！
为累而累
[解决办法]
不理解就算了，无所谓的事。
[解决办法]

探讨

这叫什么呢？煮饺子找麻烦！
为累而累

[解决办法]
这样可能会清楚些

PHP code

class cA{    /**     * Test property for using direct default value     * 使用直接默认值测试属性     */    protected static $item = 'Foo';        /**     * Test property for using indirect default value     * 使用间接默认值测试属性     */    protected static $other = 'cA';        public static function method()    {        print __METHOD__ . ' ' . __CLASS__ . '::$item=' . self::$item."\r\n";        print __METHOD__ . ' ' . __CLASS__ . '::$otfer=' . self::$other."\r\n";    }        public static function setOther($val)    {        self::$other = $val; // Set a value in this scope.    }}class cB extends cA{    /**     * Test property with redefined default value     * 重新定义了默认值测试属性     */    protected static $item = 'Bar';        public static function setOther($val)    {        self::$other = $val;    }}class cC extends cA{    /**     * Test property with redefined default value     * 重新定义了默认值测试属性     */    protected static $item = 'Tango';        public static function method()    {        print __METHOD__ . ' ' . __CLASS__ . '::$item=' . self::$item."\r\n";        print __METHOD__ . ' ' . __CLASS__ . '::$otfer=' . self::$other."\r\n";    }        /**     * Now we drop redeclaring the setOther() method, use cA with 'self::' just for fun.     */}class cD extends cA{    /**     * Test property with redefined default value     * 重新定义了默认值测试属性     */    protected static $item = 'Foxtrot';        /**     * Now we drop redeclaring all methods to complete this issue.     * 现在，我们放弃重新声明的所有方法来完成这个问题     */}cB::setOther('cB'); // It's cB::method()!cB::method(); // It's cA::method()!cC::setOther('cC'); // It's cA::method()!cC::method(); // It's cC::method()!cD::setOther('cD'); // It's cA::method()!cD::method(); // It's cA::method()! 
 
[解决办法]
１　唯一的技巧，慢慢来，一个一个来，不要急。
２　谁要在项目中，用这样的代码，我劈了他。
[解决办法]
大概看明白了，不过能不写这么纠结么？
[解决办法]
楼主就是钻研一下

探讨


大概看明白了，不过能不写这么纠结么？