PHP解引用数组元素 [英] PHP dereference array elements

问题描述

我有2个阵列。

$result = array();
$row = array();

行的元素都是引用，并在不断地变化。对于 $行的每一次迭代我要排在值复制到 $结果，而不是引用。

Row's elements are all references and is constantly changing. For each iteration of $row I want to copy the values of row into an entry of $result and not the references.

我已经找到了几个解决方案，但他们似乎都相当可怕的。

I have found a few solutions but they all seem rather awful.

$result[] = unserialize(serialize($row));
$result[] = array_flip(array_flip($row));

以上两种工作，但看起来很多不必要的和丑陋的code只是为了内容复制，而不是复制引用本身按值引用数组中。

Both of the above work but seem like a lot of unnecessary and ugly code just to copy the contents of an array of references by value, instead of copying the references themselves.

有没有做到这一点更清洁的方式吗？如果没有什么会最有效的方法是什么？

Is there a cleaner way to accomplish this? If not what would the most efficient way be?

感谢。

编辑：的建议下面的东西，如：

As suggested below something such as:

function dereference($ref) {
    $dref = array();

    foreach ($ref as $key => $value) {
        $dref[$key] = $value;
    }

    return $dref;
}

$result[] = dereference($row);

另外的作品，但似乎同样丑陋。

Also works but seems equally as ugly.

推荐答案

不知道我完全理解的问题，但您可以使用递归？

Not sure I totally understand the question, but can you use recursion?

function array_copy($source) {
    $arr = array();

    foreach ($source as $element) {
        if (is_array($element)) {
            $arr[] = array_copy($element);
        } else {
            $arr[] = $element;
        }
    }

    return $arr;
}

$result = array();
$row = array(
    array('a', 'b', 'c'),
    array('d', 'e', 'f')
);

$result[] = array_copy($row);

$row[0][1] = 'x';

var_dump($result);
var_dump($row);

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