最近做一个有关微信授权登录的项目，关于授权就不多说了，我获取到用户基本信息,格式如下：

$user_info = '{"openid":"xx","nickname":"nice花椒.","sex":2,"language":"zh_CN","city":"杭州","province":"浙江","country":"中国","headimgurl":"http:\/\/wx.qlogo.cn\/mmopen\/vi_32\/Q0j4TwGTfTJPpziaqOoIpGia9ZVj9fheAwLmTiavV4rxR40NQ1zPQPyiaMY58FEISDIfpn0q5VeeXliaKyiaiabgK2ZHg\/0","privilege":[]}';

直接把headimgurl入库保存，bug来了。

话不多说，进入正题：

微信返回的是json格式

$user_arr = json_decode($user_info, true);

获取用户openid对比数据库，判断是不是首次授权

$mem_info= $member->getuserinfo(array('openid'=>$user_arr['openid']));

首次授权或者头像链接地址与上次不同

if(!$mem_info || $mem_info['wximage']!=$user_info['headimg']){    $headimgurl = saveheadimgurl($user_arr['headimgurl']);    $headimg ? 0 : $headimg='lib/avata.jpg' ;    if($mem_info['wximage']!=$user_info['headimg']){        unlink($mem_info['headimg']);    }    //快来写你的注册或者修改代码吧！}

保存图片

function saveheadimgurl($headimg){    $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',    );    $curl = curl_init();    curl_setopt($curl, CURLOPT_URL, $headimg);    curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);      curl_setopt($curl, CURLOPT_FOLLOWLOCATION, true);    curl_setopt($curl, CURLOPT_HTTPHEADER,$header);    $dataimg = curl_exec($curl);    $code = curl_getinfo($curl, CURLINFO_HTTP_CODE);    curl_close($curl);      if ($code == 200) {             $imgBase64Code = "data:image/jpeg;base64," . base64_encode($dataimg);    }      $img_content=$imgBase64Code;    if (preg_match('/^(data:\s*image\/(\w+);base64,)/', $img_content, $result)){            $type = $result[2];         create(DOFILESPATH."head");          $new_file = DOFILESPATH."head/".md5(uniqid(rand())).".{$type}";          if (file_put_contents($new_file, base64_decode(str_replace($result[1],'', $img_content))))           {               return $new_file;         }     }     return false;}

指定位置创建文件

function create($dir){    if(is_dir($dir)){        $temp = explode('/',$dir);        $cur_dir = '';        for($i=0; $i

哈哈，我是一个专注接口的小菜鸟，多多指教！