在PHP中遍历具有嵌套输出的数组

function traverseArray($array) {
    foreach ($array as $key => $value) {
        if (is_array($value)) {
            // 如果当前元素是数组，则递归调用自身
            traverseArray($value);
        } else {
            // 如果当前元素不是数组，则输出键和值
            echo "Key: " . $key . ", Value: " . $value . "<br>";
        }
    }
}

// 示例数组
$array = array(
    "name" => "John",
    "age" => 30,
    "email" => "john@example.com",
    "address" => array(
        "street" => "123 Main Street",
        "city" => "New York",
        "country" => "USA"
    )
);

// 调用函数遍历数组
traverseArray($array);

Key: name, Value: John
Key: age, Value: 30
Key: email, Value: john@example.com
Key: street, Value: 123 Main Street
Key: city, Value: New York
Key: country, Value: USA