Implementation method of saving user avatar to server after WeChat authorization

This article mainly shares with you how to save the user's avatar to the server after WeChat authorization. I recently worked on a project about WeChat authorized login. I won't say much about authorization. I obtained the user's basic information in the following format:

$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":[]}';

Save headimgurl directly into the database, a bug is coming.

Without further ado, let’s get to the point:

WeChat returns json format

$user_arr = json_decode($user_info, true);

Get the user’s openid and compare it with the database to determine whether it is the first authorization

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

First authorization or the avatar link address is different from the last time

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！
}

Save the picture

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;
}

Create the file at the specified location

function create($dir){
    if(is_dir($dir)){
        $temp = explode('/',$dir);
        $cur_dir = '';
        for($i=0; $i
Hope it is useful to everyone. 

Related recommendations: 
How to use WeChat authorized login? Summarize the usage of WeChat authorized login examples、
Detailed explanation of WeChat authorization for WeChat development
IOS implementation of WeChat authorized login function example code

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