1.相信有很多人很多时候跟我一样，写代码习惯了从搜索引擎上去搜索粘贴，忘了寻其本意。
在开发中，我很多次都用到了Curl，但是每次都是去复制粘贴。其实Curl的基本用法也很简单，主要也就是这几个函数的使用。
$ch = curl_init(); // 创建一个新的CURL资源赋给变量$chcurl_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
如果我们希望获取内容但不输出，可以使用 CURLOPT_RETURNTRANSFER 参数，并设置其值为非0或者true值。代码如下：curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
我们可以通设置函数curl_setopt()的不同参数，可以获得不同的结果，这也是CURL扩展的强大之处。curl_setopt()函数的常用参数选项具体可查阅官方文档。
贴两个常用示例
get请求示例
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; ???????} ???}post请求示例
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; ???????} ???}有关PHP的CURL功能的基本用法
原文地址：https://www.cnblogs.com/liancheng/p/10248088.html