<?php

        /* *

        * 第一种方法

        * 远程图片转化为base64,只支持http（推荐使用）

        * */

        public static function imgUrl_to_base64($url,$auto_http = false){

            /*  $header = array(

                'User-Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:45.0) Gecko/20100101 Firefox/45.0',

                'Accept-Language: zh-CN,zh;q=0.8,en-US;q=0.5,en;q=0.3',

                'Accept-Encoding: gzip, deflate',);*/

            if(strpos($url,'https://') !== false && $auto_http == true){

                //是否自动转为http

                $url = str_replace('https://','http://',$url);

            }

            $curl = curl_init();

            curl_setopt($curl, CURLOPT_URL, $url);

            curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);

            curl_setopt($curl, CURLOPT_FOLLOWLOCATION, true);

            curl_setopt($curl, CURLOPT_ENCODING, 'gzip');

           // curl_setopt($curl, CURLOPT_HTTPHEADER, $header);

            $data = curl_exec($curl);

            $code = curl_getinfo($curl, CURLINFO_HTTP_CODE);

            curl_close($curl);

            $imgBase64Code = '';

            if($code == 200){

                $imgBase64Code = "data:image/jpeg;base64," . base64_encode($data);

            }

            return $imgBase64Code;

        }

        /* *

        * 第二种方法

        * 远程图片转化为base64,支持https,http（比较消耗服务器资源）

        * */

        function imgUrl_base64($url){

            $url='https://wx.qlogo.cn/mmopen/vi_32/Q0j4TwGTfTJm4xPKAf4u6TAQ6AGmXEmBh4yfyFcfZTOQoRzumzBEvIPaaRJXAB8Rlia1iaugJWRsdqzBhu3BTtkw/0';

            $img_file = file_get_contents($url);  $img_content=  "data:image/jpeg;base64," .base64_encode($img_file);

            return $img_content;

        }

    ?>