How to use the Symfony HTTP client to make HTTP requests?

@lily 

To use the Symfony HTTP client to make HTTP requests, you can follow these steps:

1. Install the Symfony HTTP client component using Composer. You can do this by running the following command in your terminal:

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composer require symfony/http-client

1. Create a new instance of the HttpClient class:

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use SymfonyComponentHttpClientHttpClient;

$client = HttpClient::create();

1. Use the request() method to make HTTP requests:

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$response = $client->request('GET', 'http://example.com');

This will send a GET request to http://example.com and return an instance of ResponseInterface.

1. You can also pass additional options to the request() method, such as query parameters or headers:

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$response = $client->request('GET', 'http://example.com', [
    'query' => ['param1' => 'value1'],
    'headers' => [
        'Accept' => 'application/json',
        'Authorization' => 'Bearer ' . $token,
    ],
]);

In this example, we are sending a GET request to http://example.com with the query parameter param1=value1 and two headers: Accept and Authorization.

1. You can access the response status code, headers, and body using methods on the ResponseInterface object:

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$status = $response->getStatusCode();
$headers = $response->getHeaders();
$content = $response->getContent();

These methods will return the HTTP status code, headers, and body of the response, respectively.

That's it! You can now use the Symfony HTTP client to make HTTP requests in your PHP application.