PHP中使用CURL实现GET、POST、PUT、DELETE请求

    private function curl_post($url, $data, $method = 'GET', $type = 'json', $headers = [])
    {
        try {
            //初始化
            $ch = curl_init();
            $headers[] = "cache-control: no-cache";
            $contentType = [
                'json' => 'Content-Type: application/json',
            ];
            if ($method == 'GET') {
                if ($data) {
                    $querystring = http_build_query($data);
                    $url = $url . '?' . $querystring;
                }
            }
            $headers[] = $contentType[$type];

            // 请求头，可以传数组
            curl_setopt($ch, CURLOPT_URL, $url);
            curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
            curl_setopt($ch, CURLOPT_HEADER, false);
            curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);         // 执行后不直接打印出来
            if ($method == 'POST') {
                if ($type == 'json') {
                    $data = json_encode($data);
                }
                curl_setopt($ch, CURLOPT_CUSTOMREQUEST, 'POST');     // 请求方式
                curl_setopt($ch, CURLOPT_POST, true);               // post提交
                curl_setopt($ch, CURLOPT_POSTFIELDS, $data);                 // post的变量
            }
            if ($method == 'PUT') {
                curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "PUT");
                curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
            }
            if ($method == 'DELETE') {
                curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "DELETE");
                curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
            }

            curl_setopt($ch, CURLOPT_TIMEOUT, 10);  // 最大执行时间
            curl_setopt($ch, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1);  // 最大执行时间
            curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false); // 跳过证书检查
            curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false); // 不从证书中检查SSL加密算法是否存在
            curl_setopt($ch, CURLOPT_SSLVERSION, 3);
            $output = curl_exec($ch); //执行并获取HTML文档内容
            $err = curl_error($ch);
            if ($err) {
                var_dump($err);exit;
            }
            curl_close($ch); //释放curl句柄
            var_dump($output);exit;
        } catch (\Exception $e) {
            var_dump($e);exit;
        }
    }