PHP循环遍历嵌套的JSON以查找值

$json = '{"name": "John", "age": 30, "city": "New York", "pets": [{"name": "Fluffy", "type": "cat"}, {"name": "Buddy", "type": "dog"}]}';
$data = json_decode($json, true);

// 使用foreach遍历关联数组
foreach ($data as $key => $value) {
    if ($key === 'name') {
        echo "Name: " . $value . "\n";
    } elseif ($key === 'age') {
        echo "Age: " . $value . "\n";
    } elseif ($key === 'city') {
        echo "City: " . $value . "\n";
    } elseif ($key === 'pets') {
        echo "Pets:\n";
        foreach ($value as $pet) {
            echo "  - Name: " . $pet['name'] . ", Type: " . $pet['type'] . "\n";
        }
    }
}

function searchValue($data, $targetKey) {
    foreach ($data as $key => $value) {
        if ($key === $targetKey) {
            echo "Found value: " . $value . "\n";
        } elseif (is_array($value) || is_object($value)) {
            searchValue($value, $targetKey);
        }
    }
}

searchValue($data, 'name');