PHP搜索特定值的多维数组

function searchValue($array, $value) {
    foreach ($array as $key => $item) {
        if (is_array($item)) {
            $result = searchValue($item, $value);
            if ($result !== false) {
                return $result;
            }
        } elseif ($item === $value) {
            return $key;
        }
    }
    return false;
}

// 示例用法
$array = [
    'a' => [
        'b' => 'value1',
        'c' => 'value2',
    ],
    'd' => [
        'e' => 'value3',
        'f' => 'value4',
    ],
];

$searchValue = 'value3';
$result = searchValue($array, $searchValue);

if ($result !== false) {
    echo "找到了，键名为: " . $result;
} else {
    echo "未找到指定值";
}