在php的foreach循环中更改关联数组的$key [英] Change $key of associative array in a foreach loop in php

问题描述

我有一个这样的数组:

array(
    'firstName' => 'Joe',
    'lastName'  => 'Smith'
    )

我需要遍历数组中的每个元素，最后，数组应如下所示:

I need to loop over every element in my array and in the end, the array should look like this:

array(
    'FirstName' => 'Joe',
    'LastName'  => 'Smith'
    )

失败的想法是:

    foreach($array as $key => $value)
    {
        $key = ucfirst($key);
    }

这显然行不通，因为数组不是通过引用传递的.然而，所有这些尝试也都失败了:

This obviously will not work, because the array is not passed by reference. However, all these attempts also fail:

    foreach(&$array as $key => $value)
    {
        $key = ucfirst($key);
    }


    foreach($array as &$key => $value)
    {
        $key = ucfirst($key);
    }

我的智慧以这个结尾.我使用的是 Magento 1.9.0.1 CE，但这与这个问题无关.如果您必须知道，我必须这样做的原因是因为我有一堆对象，我将这些对象作为数组返回以组装到 SOAP 客户端.我使用的 API 要求键以大写字母开头……但是，我不希望将对象变量名的第一个字母大写.傻，我知道，但我们都回答某人，而且某人想要那样.

Pretty much at my wits end with this one. I'm using Magento 1.9.0.1 CE, but that's pretty irrelevant for this problem. If you must know, the reason I have to do this is because I have a bunch of object that's I'm returning as an array to be assembled into a SOAP client. The API I'm using requires the keys to begin with a capital letter...however, I don't wish to capitalize the first letter of my object's variable names. Silly, I know, but we all answer to someone, and that someone wants it that way.

推荐答案

unset 如果它已经是正确的格式，首先它，否则你将删除你刚刚定义的内容:

unset it first in case it is already in the proper format, otherwise you will remove what you just defined:

foreach($array as $key => $value)
    {
        unset($array[$key]);
        $array[ucfirst($key)] = $value;
    }

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