在现代web应用程序开发中，HTTP处理变得越来越重要。对于PHP 开发人员来说，使用PHP HTTPhelper 功能非常强大，可以帮助开发人员快速创建和处理HTTP请求和响应，这个库的功能非常广泛且易于使用。下文将详细讲解PHP HTTPhelper 的使用。

首先您需要安装PHP HTTPhelper库，您可以通过composer来完成这个过程：

$ composer require php-http/guzzle6-adapter

接下来，您就可以开始使用HTTPhelper库了。

下面是一些常用的功能：

1.创建请求：

use Http\Client\HttpClient;use Http\Message\RequestFactory;use Http\Client\Common\HttpMethodsClient;$httpClient = new HttpClient; // you can inject a specific HTTP client here$requestFactory = new RequestFactory;$client = new HttpMethodsClient($httpClient, $requestFactory);$request = $requestFactory->createRequest('POST','https://httpbin.org/post',['Content-Type' =>'application/json'],'{"hello":"world"}');$response = $client->sendRequest($request);

上面的代码使用 HttpMethodsClient 对象创建了一个POST请求（HTTP方法）并发送到远程服务器。这个请求包含header以及传输数据的请求体部分。 发送成功后，该代码将返回服务器响应，可以打印响应内容：

printf("HTTP/%s %d %s\n",$response->getProtocolVersion(),$response->getStatusCode(),$response->getReasonPhrase());foreach ($response->getHeaders() as $name =>$values) {foreach ($values as $value) {printf("%s: %s\n", $name, $value);}}echo "\n".$response->getBody()."\n";

另外一个符合 HTTP 标准的库是 Guzzle，可以作为PHP HTTPhelper 的httpClient 和 requestFactory 的实现。根据 Guzzle 的文档，您可以这样使用 HttpGuzzle6Adapter :

use Http\Adapter\Guzzle6\Client as GuzzleHttpClient;use GuzzleHttp\Client as GuzzleClient;use Http\Message\MessageFactory\GuzzleMessageFactory;$guzzle = new GuzzleClient();$httpClient = new GuzzleHttpClient($guzzle);$messageFactory = new GuzzleMessageFactory();$client = new HttpMethodsClient($httpClient, $messageFactory);$request = $messageFactory->createRequest('GET', 'http://example.com');$response = $client->sendRequest($request);

2.发送JSON请求：

将 PHP 数组封装成json 请求：

use Http\Client\Common\RequestFactory;use Http\Message\RequestFactory\Psr17FactoryDiscovery;$requestFactory = Psr17FactoryDiscovery::findRequestFactory();$headers = ['User-Agent' =>'Mozilla/5.0 (Windows NT 6.1; WOW64; rv:54.0) Gecko/20100101 Firefox/54.0','Accept'     =>'application/json','Content-Type' =>'application/json',];$body = json_encode(['prop1' =>'value','prop2' =>123,]);$request = $requestFactory->createRequest('POST','https://example.com/api',$headers,$body);$response = $client->sendRequest($request);

3.发送表单数据：

发送表单数据可以使用 PHP HTTPhelper 库的 FormParameterInterface 接口实现。FormParameterInterface 描述表单参数与值的对应关系。使用此接口，您可以从 PHP 数组中获取这些参数并将它们设置为表单参数：

use Http\Message\RequestFactory\StandardFactory;use Http\Message\UriFactory\StandardFactory;use Nyholm\Psr7\Factory\Psr17Factory;$requestFactory = new StandardFactory(new Psr17Factory(), new Psr17Factory(), new Psr17Factory());$uriFactory = new StandardFactory();$parameters = ['foo' =>['bar', 'baz']];$request = $requestFactory->createRequest('POST',$uriFactory->createUri('https://postman-echo.com/post'),);foreach ($parameters as $name =>$value) {$request = $request->withAddedHeader($name, $value);}$response = $client->sendRequest($request);

4.使用凭据进行身份验证:

凭据是 HTTP 用户名和密码的组合，如果您需要发送 HTTP 请求并在其上使用凭据进行身份验证，可以使用以下代码：

use Http\Message\RequestFactory\StandardFactory;use Http\Message\UriFactory\StandardFactory;use Nyholm\Psr7\Factory\Psr17Factory;use Http\Client\Common\Plugin;use Http\Client\Common\Plugin\AddHostPlugin;use Http\Client\Common\Plugin\AuthenticationPlugin;$requestFactory = new StandardFactory(new Psr17Factory(), new Psr17Factory(), new Psr17Factory());$uriFactory = new StandardFactory();$username = 'my_username';$password = 'my_password';$url = 'https://my-api.com';$credentials = sprintf('%s:%s', $username, $password);$request = $requestFactory->createRequest('GET',$uriFactory->createUri($url));$client = Http\Client\HttpClient::createWithMiddleware([new Http\Client\Common\Plugin\BaseUriPlugin($uriFactory->createUri($url)),new AuthenticationPlugin(new Psr7Authentication(new Psr17Factory(),new Psr17Factory(),new Psr17Factory(),new Psr7RequestFactory(),$credentials)),]);$response = $client->sendRequest($request);

最后，这些仅仅是 PHP HTTP Helper 功能的一部分，它是一个功能强大的工具，可以帮助 PHP 开发人员轻松地创建和处理 HTTP 请求和响应。希望本篇文章能够对您的工作有所帮助。