我有2个数组，我需要找到数组1中的一个值是否匹配数组2中的一个值，即多维数组。我还需要检查数组1中的值是否在数组2中的特定键中，“principal”键作为“权限”键也可以保存此值。
这里是数组一：
Array
(
[0] => 17
[1] => 6
[2] => 3
[3] => 2
)
和数组2 [为了便于阅读，实际上略微截断]：
Array
(
[modAccessResourceGroup] => Array
(
[3] => Array
(
[0] => Array
(
[principal] => 0
[authority] => 9999
[policy] => Array
(
[load] => 1
)
)
[1] => Array
(
[principal] => 2
[authority] => 10
[policy] => Array
(
[add_children] => 1
[create] => 1
[copy] => 1
[delete] => 1
[list] => 1
[load] => 1
[move] => 1
[publish] => 1
[remove] => 1
[save] => 1
[steal_lock] => 1
[undelete] => 1
[unpublish] => 1
[view] => 1
)
)
.... truncated ....
[13] => Array
(
[principal] => 16
[authority] => 9999
[policy] => Array
(
[load] => 1
)
)
)
[8] => Array
(
[0] => Array
(
[principal] => 0
[authority] => 9999
[policy] => Array
(
[load] => 1
)
)
[1] => Array
(
[principal] => 1
[authority] => 9999
[policy] => Array
(
[add_children] => 1
[create] => 1
[copy] => 1
[delete] => 1
[list] => 1
[load] => 1
[move] => 1
[publish] => 1
[remove] => 1
[save] => 1
[steal_lock] => 1
[undelete] => 1
[unpublish] => 1
[view] => 1
)
)
[2] => Array
(
[principal] => 22
[authority] => 9999
[policy] => Array
(
[add_children] => 1
[create] => 1
[copy] => 1
[delete] => 1
[list] => 1
[load] => 1
[move] => 1
[publish] => 1
[remove] => 1
[save] => 1
[steal_lock] => 1
[undelete] => 1
[unpublish] => 1
[view] => 1
)
)
)
)
)
我使用了一系列foreach（）{foreach（）{foreach（）{}}}但它看起来非常混乱且效率低下。在解决这个问题时遇到一些麻烦。有什么想法吗？
答案 0 :(得分：1)
递归函数应该可以解决这个问题：
$values = array(17, 6, 3, 2, 5);
function find($array, &$values) {
foreach ($array as $key => $element) {
if (is_array($element)) {
find($element, $values);
}
elseif ($key == 'principal') {
foreach ($values as $value) {
if ($element == $value) {
echo 'Found' . PHP_EOL;
// Do stuff
}
}
}
}
}
find($array, $values);
答案 1 :(得分：1)
有些事情会浮现在脑海中。首先，在这种情况下，我通常会创建一个只包含主值的单独数组，这样我就可以遍历第一个数组，只需使用简单的in_array()检查。其次，如果你不想这样做，你可以使用array_walk_recursive()函数或array_search()中的一些递归示例来完成第二个数组。