php如何刪除多維數組

php刪除多維數組的方法：先建立一個PHP範例檔案；然後透過unsetMultiKeys方法刪除複雜的多維數組裡面的指定鍵值對；最後查看運行結果即可。

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php刪除多維數組裡面的值

在手冊裡面發現，改造後變成了一個函數，可以刪除複雜的多維數組裡面的製定鍵值對！

<?php
$arr = [
    &#39;test&#39; => &#39;value&#39;,
    &#39;level_one&#39; => [
        &#39;level_two&#39; => [
            &#39;level_three&#39; => [
                &#39;replace_this_array&#39; => [
                    &#39;special_key&#39; => &#39;replacement_value&#39;,
                    &#39;key_one&#39; => &#39;testing&#39;,
                    &#39;key_two&#39; => &#39;value&#39;,
                    &#39;four&#39; => &#39;another value&#39;,
                ],
            ],
            &#39;ordinary_key&#39; => &#39;value&#39;,
        ],
    ],
];
$unset = array(&#39;special_key&#39;, &#39;ordinary_key&#39;, &#39;four&#39;);
echo "<pre class="brush:php;toolbar:false">";
print_r(unsetMultiKeys($unset, $arr));
print_r($arr);
echo "

"; exit; function unsetMultiKeys($unset, $array) { $arrayIterator = new \RecursiveArrayIterator($array); $recursiveIterator = new \RecursiveIteratorIterator($arrayIterator, \RecursiveIteratorIterator::SELF_FIRST); foreach ($recursiveIterator as $key => $value) { foreach ($unset as $v) { if (is_array($value) && array_key_exists($v, $value)) { // 删除不要的值 unset($value[$v]); // Get the current depth and traverse back up the tree, saving the modifications $currentDepth = $recursiveIterator->getDepth(); for ($subDepth = $currentDepth; $subDepth >= 0; $subDepth--) { // Get the current level iterator $subIterator = $recursiveIterator->getSubIterator($subDepth); // If we are on the level we want to change, use the replacements ($value) other wise set the key to the parent iterators value $subIterator->offsetSet($subIterator->key(), ($subDepth === $currentDepth ? $value : $recursiveIterator->getSubIterator(($subDepth + 1))->getArrayCopy())); } } } } return $recursiveIterator->getArrayCopy(); }

運行結果：

改變多維數組裡面的鍵值對

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