PHP - 如何重命名对象属性? [英] PHP - How to rename an object property?

问题描述

我想知道如何在 PHP 中重命名对象属性，例如:

I wonder how can I rename an object property in PHP, e.g.:

<?php
    $obj = new stdclass();
    $obj->a = 10;  // will be renamed
    $obj->b = $obj->a; // rename "a" to "b", somehow!
    unset($obj->a); // remove the original one

它在 PHP5.3 中不起作用，(不要谈论早期版本)因为将 $obj->a 的引用分配给 $obj->b 等取消设置 $obj->a，$obj->b 的值将为空.请问有什么想法吗?

It does not work in PHP5.3, (donno about earlier versions) since there will be a reference of $obj->a assigned to $obj->b and so by unsetting $obj->a, the value of $obj->b will be null. Any ideas please?

推荐答案

你的代码工作正常，$obj->b 执行后为 10: http://codepad.org/QnXvueic

Your code works correctly, $obj->b is 10 after execution: http://codepad.org/QnXvueic

当您取消设置 $obj->a 时，您只是删除了该属性，而不会触及该值.如果该值被其他变量使用，则它在 order 变量中保持不变.

When you unset $obj->a, you just remove the property, you do not touch to the value. If the value is used by an other variable, it's left untouched in the order variable.

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