PHP 8.1: implementing Asynchronous HTTP Requests Using Guzzle and Promises
I'm attempting to set up I've been banging my head against this for hours... I'm trying to implement asynchronous HTTP requests in my PHP 8.1 application using Guzzle. I have a function that sends multiple requests concurrently using promises, but I'm working with unexpected behavior when resolving these promises. Specifically, I'm not getting the expected responses, and sometimes, the promises seem to resolve even before the requests are completed. Here’s a simplified version of my code: ```php use GuzzleHttp\Client; use GuzzleHttp\Promise; $client = new Client(); function fetchUrls($urls) { $promises = []; foreach ($urls as $url) { $promises[] = $client->getAsync($url); } // Wait for the requests to complete and return the responses $responses = Promise::settle($promises)->wait(); return array_map(function ($response) { return $response['state'] === 'fulfilled' ? $response['value']->getBody() : null; }, $responses); } $urls = ['https://api.example.com/data1', 'https://api.example.com/data2']; $responses = fetchUrls($urls); print_r($responses); ``` When I run this, I expect to get an array of response bodies, but instead, I'm sometimes getting `null` values in the output, and I suspect it's due to the way I'm handling the promises. I've also tried logging the state of each promise before resolving them, and I occasionally see that the promises are marked as fulfilled even though the corresponding request has not completed successfully. I’ve checked the Guzzle documentation, but I still can’t pinpoint where I might be going wrong. Has anyone experienced similar issues or can provide insight on best practices for handling asynchronous requests in Guzzle with PHP 8.1? My development environment is Ubuntu. Is there a better approach? I'm using Php 3.10 in this project.