Guzzle library in PHP8.0

Recently, PHP developers have welcomed a new partner-Guzzle 7.0. As an HTTP client library, Guzzle is welcomed and used by many PHP programmers. Now, with the release of PHP8.0, the Guzzle library has also appeared in our field of vision with a new attitude.

This article will mainly introduce how to use the Guzzle library in PHP8.0 and some tips.

1. Introduction to Guzzle library

Guzzle is an HTTP client library that uses the HTTP protocol and PHP streaming tools to implement fast, scalable, flexible and transparent HTTP requests. It supports synchronous, asynchronous requests and message requests, automatic retry of failed requests, and the ability to customize middleware.

The Guzzle library is very popular in the PHP field and is widely used in RESTful API calls, crawler development, HTTP proxy, etc.

2. New features of Guzzle 7.0

Guzzle 7.0 is the latest version of Guzzle, which introduces some new features in PHP8.0:

1. Builder enhancements : In the new version, we can add query parameters to the request by using the ->setQuery() method.
2. Improved exception handling: In Guzzle 7.0, the exception class has been updated and supports Throw exception handling.
3. Added several request formats: In the new version of Guzzle, we can use 'body' => fopen('/path/to/file', 'r')and'body' => 'example of string' way to send the request.
4. Optimize request response time: The new version of Guzzle provides an optional stream controller that allows data flow to be processed between requests and responses, which helps reduce response time and save bandwidth resources.

3. Guzzle client example

Next, we will use examples to demonstrate the use of the Guzzle library.

1. Send GET request:

$client = new GuzzleHttpClient();
$response = $client->request('GET', 'https://jsonplaceholder.typicode.com/posts');
echo $response->getBody();

Code analysis: The above code creates a Guzzle client instance, initiates a GET request to the specified URL, and obtains the response result.

2. Send POST request:

$client = new GuzzleHttpClient();
$response = $client->request('POST', 'https://jsonplaceholder.typicode.com/posts', [
    'form_params' => [
        'title' => 'foo',
        'body' => 'bar',
        'userId' => 1
    ]
]);
echo $response->getStatusCode(); //200
echo $response->getBody();

Code analysis: The above code creates a Guzzle client instance, initiates a POST request to the specified URL, and passes ## The #form_params option sets the request body content. Finally, this example outputs the HTTP status code and response result.

Asynchronous request:

$client = new GuzzleHttpClient();
$request = new GuzzleHttpPsr7Request('GET', 'https://jsonplaceholder.typicode.com/posts');
$promise = $client->sendAsync($request)->then(function ($response) {
    echo 'I completed! ' . $response->getStatusCode();
});
$promise->wait();

Code analysis: The above code creates a Guzzle client instance and an asynchronous request, and sets a Promise callback function. By calling the

->wait() method, wait for the asynchronous request to complete and trigger the callback function.

4. Conclusion
As a very excellent HTTP client library, the Guzzle library is of self-evident importance in PHP development. As Guzzle 7.0 introduces many new features and optimizations in PHP8.0, I believe it will continue to occupy a valuable position among PHP developers in the future. I hope this article will be helpful to everyone, and readers are welcome to understand and use the Guzzle library in depth.

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