php如何删除多维数组

php删除多维数组的方法：首先创建一个PHP示例文件；然后通过unsetMultiKeys方法删除复杂的多维数组里面的指定键值对；最后查看运行结果即可。

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php删除多维数组里面的值

在手册里面发现，改造后变成了一个函数，可以删除复杂的多维数组里面的制定键值对！

<?php $arr = [     'test' => 'value',     'level_one' => [         'level_two' => [             'level_three' => [                 'replace_this_array' => [                     'special_key' => 'replacement_value',                     'key_one' => 'testing',                     'key_two' => 'value',                     'four' => 'another value',                 ],             ],             'ordinary_key' => 'value',         ],     ], ]; $unset = array('special_key', 'ordinary_key', 'four'); echo "<pre>"; print_r(unsetMultiKeys($unset, $arr)); print_r($arr); echo "</pre>"; 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(); }

运行结果：

改变多维数组里面的键值对