Example of PHP using CURL MULTI to implement concurrent collection

In this article, we will introduce how to use PHP's CURL MULTI function to achieve concurrent collection. CURL MULTI is a powerful tool that allows us to make multiple HTTP requests simultaneously and get the results when they complete. This is useful for applications that need to collect large amounts of data or need to handle multiple requests simultaneously.

First, we need to make sure that the CURL extension is installed on the server. If it is not installed yet, you can install it with the following command:

sudo apt-get install php-curl

Next, we will write a multi_curl.phpscript named to implement the concurrent collection function. Here is the complete code:

<?php
// 创建一个批处理句柄
$mh = curl_multi_init();

// 创建多个CURL句柄
$urls