Question

我是PHP编程新手，我正在尝试为Amazon REST请求创建签名请求。为了正确签署请求，我必须按字节值（不按字母顺序）对参数/值对进行排序。他们提供了一个样本集作为例子：

Service=AWSECommerceService
AWSAccessKeyId=AKIAIOSFODNN7EXAMPLE
AssociateTag=mytag-20
Operation=ItemLookup
ItemId=0679722769
ResponseGroup=Images%2CItemAttributes%2COffers%2CReviews
Version=2013-08-01
Timestamp=2014-08-18T12%3A00%3A00Z

排序值：

AWSAccessKeyId=AKIAIOSFODNN7EXAMPLE
AssociateTag=mytag-20
ItemId=0679722769
Operation=ItemLookup
ResponseGroup=Images%2CItemAttributes%2COffers%2CReviews
Service=AWSECommerceService
Timestamp=2014-08-18T12%3A00%3A00Z
Version=2013-08-01

所以，我创建了一个名为$parameters的关联数组，它以这种语法保存所有这些值：

$parameters = array ( "Service="        => "AWSECommerceService",
                      "AWSAccessKeyId=" => "AKIAIOSFODNN7EXAMPLE",
                      "AssociateTag="   => "mytag-20",
                      "Operation="      => "ItemLookup"
                    );

是否有方法对连接的各个键/值对的组合值进行排序？或者我是否必须将它们组合成一个临时数组，对它们进行排序，然后将它们放回到关联数组中？

非常感谢任何指导。

Answer 1

我不知道为什么JYoThl删除了他的anwser，ksort将完成这项工作：

$parameters = array(
    "Service=" => "AWSECommerceService",
    "AWSAccessKeyId=" => "AKIAIOSFODNN7EXAMPLE",
    "AssociateTag=" => "mytag-20",
    "Operation=" => "ItemLookup",
    "ItemId=" => "0679722769",
    "ResponseGroup=" => "Images%2CItemAttributes%2COffers%2CReviews",
    "Version=" => "2013-08-01",
    "Timestamp=" => "2014-08-18T12%3A00%3A00Z"
);

ksort($parameters);

print_r($parameters);

输出：

Array
(
    [AWSAccessKeyId=] => AKIAIOSFODNN7EXAMPLE
    [AssociateTag=] => mytag-20
    [ItemId=] => 0679722769
    [Operation=] => ItemLookup
    [ResponseGroup=] => Images%2CItemAttributes%2COffers%2CReviews
    [Service=] => AWSECommerceService
    [Timestamp=] => 2014-08-18T12%3A00%3A00Z
    [Version=] => 2013-08-01
)

Answer 2

使用ksort（）根据键：

按升序对关联数组进行排序

SKLabelNode

PHP7：按键和值

2 个答案: