我对PHP非常陌生，所以请放轻松我。这个问题让我困惑了好几个小时，所以我想我会吞下自己的骄傲来找你们，希望你能明白这可能是个问题。
我有一个数组，我已使用以下代码从对象数组转换：
$category_tree = $client->catalogCategoryTree($session_id); // Get an object array of all categories and assign to $category_tree.
$category_list = (array) $category_tree; // Convert $category_tree into an array and assign to $category_list.
使用print_r($category_list)时输出如下：
Array
(
[category_id] => 1
[parent_id] => 0
[name] => Root Catalog
[position] => 0
[level] => 0
[children] => Array
(
[0] => stdClass Object
(
[category_id] => 2
[parent_id] => 1
[name] => Root Category
[is_active] => 1
[position] => 1
[level] => 1
[children] => Array
(
[0] => stdClass Object
(
[category_id] => 8
[parent_id] => 2
[name] => Designer
[is_active] => 1
[position] => 1
[level] => 2
[children] => Array
(
)
)
[1] => stdClass Object
(
[category_id] => 7
[parent_id] => 2
[name] => Shop Bags
[is_active] => 1
[position] => 2
[level] => 2
[children] => Array
(
)
)
[2] => stdClass Object
(
[category_id] => 5
[parent_id] => 2
[name] => DifferentCategory
[is_active] => 1
[position] => 3
[level] => 2
[children] => Array
(
[0] => stdClass Object
(
[category_id] => 6
[parent_id] => 5
[name] => 1
[is_active] => 1
[position] => 1
[level] => 3
[children] => Array
(
)
)
)
)
[3] => stdClass Object
(
[category_id] => 4
[parent_id] => 2
[name] => Sample Category
[is_active] => 1
[position] => 6
[level] => 2
[children] => Array
(
)
)
)
)
)
)
当我使用in_array()测试此数组中是否存在字符串时，结果告诉我它确实存在于字符串中，尽管它没有这样做。请参阅以下代码：
$string = 'Chanel';
if (in_array($string, $category_list)) {
echo 'The string is in the array';
} else {
echo 'The string is not in the array';
}
输出：
The string is in the array
但它不是（正如你从上面的数组输出中看到的那样）。
提前感谢您提供有关此新人的任何见解：）
答案 0 :(得分：1)
我怀疑是否存在某种强制类型。当php必须将字符串Chanel与整数进行比较时，它会进行一些类型转换以获得结果。看来你宁愿这不会发生。幸运的是，in_array()有一个第三个可选参数，它控制类型是否必须与值匹配。
尝试更改：
if (in_array($string, $category_list)) {
到
if (in_array($string, $category_list, true)) {