PHP function introduction—curl_multi_close(): Close a multiple cURL session

PHP function introduction—curl_multi_close(): Close a multiple cURL session

Introduction
When using PHP to make network requests, the cURL library is usually used to send the request. The cURL library provides many useful functions, one of which is the curl_multi_close() function. This function is used to close multiple cURL sessions.

curl_multi_close() The function can effectively release the resources occupied by multiple cURL sessions created by the curl_multi_init() function. After all requests have been completed and responses processed, it is a good practice to close the session using the curl_multi_close() function.

Code Example
The following is a code example using the curl_multi_init() and curl_multi_close() functions:

<?php
// 创建多个cURL会话
$multiHandle = curl_multi_init();

// 添加第一个请求
$ch1 = curl_init();
curl_setopt($ch1, CURLOPT_URL, 'https://example.com/api/1');
curl_setopt($ch1, CURLOPT_RETURNTRANSFER, true);
curl_multi_add_handle($multiHandle, $ch1);

// 添加第二个请求
$ch2 = curl_init();
curl_setopt($ch2, CURLOPT_URL, 'https://example.com/api/2');
curl_setopt($ch2, CURLOPT_RETURNTRANSFER, true);
curl_multi_add_handle($multiHandle, $ch2);

// 执行并等待所有请求完成
// ...

// 关闭会话
curl_multi_close($multiHandle);
?>

In the above code , first use the curl_multi_init() function to create a handle to multiple cURL sessions. Then, use the curl_init() function to initialize two independent cURL sessions with different URLs and other options, and use the curl_multi_add_handle() function to add them to multiple cURL sessions middle.

Afterwards, ensure that all requests are completed by executing the code for all requests and waiting for them to complete (this part of the code is not shown in this example). Finally, use the curl_multi_close() function to close the handles of multiple cURL sessions to release the occupied resources.

Summary
curl_multi_close()The function is a very convenient and important function, used to close multiple cURL sessions created by the curl_multi_init() function. Using this function can ensure timely release of resources and improve application performance. When handling network requests, be sure to remember to use this function appropriately.

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