Basic usage of curl function extension in PHP-PHP Tutorial-php.cn

PHP’s curl function provides many functions, which need to be combined together in specific steps. Let’s first understand the basic steps of setting up a curl request in PHP.

$ch = curl_init(); // 创建一个新的CURL资源赋给变量$ch curl_setopt($ch, CURLOPT_URL, $url); // 设置URL $response = curl_exec($ch); // 执行，获取URL并输出到浏览器 curl_close($ch); // 释放资源

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If we want to get the content but not output it, we can use the CURLOPT_RETURNTRANSFER parameter and set its value to a non-0 or true value.

The code is as follows:

curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);

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We can get different results by setting different parameters of the function curl_setopt(). This is also the power of the CURL extension. The common parameter options of the curl_setopt() function can be found in the official documentation and will not be listed here.

The following are my commonly used curl get and post request methods:

Get request:

public function httpGet(string $url = '') { // 记录请求信息的日志 // todo try { $ch = curl_init(); curl_setopt($ch, CURLOPT_URL, $url); curl_setopt($ch, CURLOPT_HEADER, 0); curl_setopt($ch, CURLOPT_RETURNTRANSFER, true); curl_setopt($ch, CURLOPT_TIMEOUT, 60); //https 请求 if (strlen($url) > 5 && strtolower(substr($url, 0, 5)) == "https") { curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false); curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false); } $response = curl_exec($ch); $errorCode = curl_errno($ch); curl_close($ch); if (!empty($errorCode)) { // 可记录错误码日志 return null; } // 记录返回结果日志 return $response; } catch (\Exception $e) { $errorLog = [ 'msg' => $e->getMessage(), 'trace' => $e->getTraceAsString(), 'data' => [ 'url' => $url, ] ]; // 记录错误日志 return null; } } ```php

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POST request:

public function httpPost(string $url = '', array $data = []) { // 记录请求信息的日志 // todo try { $jsonData = json_encode($data); $curl = curl_init(); curl_setopt($curl, CURLOPT_URL, $url); curl_setopt($curl, CURLOPT_POST, 1); curl_setopt($curl, CURLOPT_POSTFIELDS, $jsonData); curl_setopt($curl, CURLOPT_HEADER, 0); curl_setopt($curl, CURLOPT_TIMEOUT, 60); curl_setopt($curl, CURLOPT_HTTPHEADER, [ 'Content-Type: application/json; charset=utf-8', 'Content-Length:' . strlen($jsonData) ]); curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1); //https 请求 if (strlen($url) > 5 && strtolower(substr($url, 0, 5)) == "https") { curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false); curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, false); } $result = curl_exec($curl); $errorCode = curl_errno($curl); curl_close($curl); if (!empty($errorCode)) { // 可记录错误码日志 return null; } // 记录返回结果日志 return json_decode($result, true); } catch (\Exception $e) { $errorData = [ 'msg' => $e->getMessage(), 'trace' => $e->getTraceAsString(), 'data' => [ 'url' => $url, 'postData' => $data ] ]; // 记录错误日志 return null; } }

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This article is part of Reprinted, the original address is:

https://tsmliyun.github.io/php/Basic usage of PHP’s CURL function extension/

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