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

$cur_dir .= $temp[$i].'/';

if(!is_dir($cur_dir)){

@mkdir($cur_dir,777);

}

}

}

}

哈哈，我是一个专注接口的小菜鸟，多多指教！