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WeChat public platform development automatically updates WeChat access token
WeChat public platform development automatically updates WeChat access token
Mar 07, 2017 am 10:19 AM
This article introduces how to store and update access tokens.
1. Access Token
access_token is the globally unique ticket of the public account. The public account needs to use access_token when calling each interface. Under normal circumstances, access_token is valid for 7200 seconds. Repeated acquisition will cause the last access_token to become invalid.
The public account can use AppID and AppSecret to call this interface to obtain access_token. AppID and AppSecret can be obtained in development mode (you need to be a developer and your account has no abnormal status). Note that the https protocol must be used when calling all WeChat interfaces.
Interface call request description
http請(qǐng)求方式:?GET https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=APPID&secret=APPSECRET
Parameter description
| Parameter | Is it necessary | Explanation |
|---|---|---|
| grant_type | Yes | Get access_token and fill in client_credential |
| appid | is | The only credential for third-party users |
| secret | is | The unique credential key for third-party users, both appsecret |
Return instructions
Under normal circumstances, WeChat will return the following JSON data packet to the public account:
{"access_token":"ACCESS_TOKEN","expires_in":7200}
3. Implementation
class?class_weixin
{
????var?$appid?=?APPID;
????var?$appsecret?=?APPSECRET;
????//構(gòu)造函數(shù)，獲取Access?Token
????public?function?__construct($appid?=?NULL,?$appsecret?=?NULL)
????{
????????if($appid?&&?$appsecret){
????????????$this->appid?=?$appid;
????????????$this->appsecret?=?$appsecret;
????????}
????????//1.?數(shù)據(jù)庫形式
????????/*
????????DROP?TABLE?IF?EXISTS?`wx_token`;
????????CREATE?TABLE?IF?NOT?EXISTS?`wx_token`?(
??????????`id`?int(1)?NOT?NULL,
??????????`type`?varchar(20)?NOT?NULL,
??????????`expire`?varchar(16)?NOT?NULL,
??????????`value`?varchar(600)?NOT?NULL,
??????????PRIMARY?KEY?(`id`)
????????)?ENGINE=MyISAM?DEFAULT?CHARSET=utf8;
????????INSERT?INTO?`wx_token`?(`id`,?`type`,?`expire`,?`value`)?VALUES
????????(1,?'access_token',?'1425534992',?'t3oyW9fRnOWKQHQhZXoEH-pgThhjmnCqTVpaLyUD'),
????????(2,?'jsapi_ticket',?'',?'');
????????*/
????????$con?=?mysql_connect(MYSQLHOST.':'.MYSQLPORT,?MYSQLUSER,?MYSQLPASSWORD);
????????mysql_select_db(MYSQLDATABASE,?$con);
????????$result?=?mysql_query("SELECT?*?FROM?`wx_token`?WHERE?`type`?=?'access_token'");
????????while($row?=?mysql_fetch_array($result))
????????{
????????????$this->access_token?=?$row['value'];
????????????$this->expires_time?=?$row['expire'];
????????????break;
????????}
????????if?(time()?>?($this->expires_time?+?3600)){
????????????$url?=?"https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=".$this->appid."&secret=".$this->appsecret;
????????????$res?=?$this->http_request($url);
????????????$result?=?json_decode($res,?true);
????????????$this->access_token?=?$result["access_token"];
????????????$this->expires_time?=?time();
????????????mysql_query("UPDATE?`wx_token`?SET?`expire`?=?'$this->expires_time',?`value`?=?'$this->access_token'?WHERE?`type`?=?'access_token';");
????????}
????????//2.?緩存形式
????????if?(isset($_SERVER['HTTP_APPNAME'])){????????//SAE環(huán)境，需要開通memcache
????????????$mem?=?memcache_init();
????????}else?{????????????????????????????????????????//本地環(huán)境，需已安裝memcache
????????????$mem?=?new?Memcache;
????????????$mem->connect('localhost',?11211)?or?die?("Could?not?connect");
????????}
????????$this->access_token?=?$mem->get($this->appid);
????????if?(!isset($this->access_token)?||?empty($this->access_token)){
????????????$url?=?"https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=".$this->appid."&secret=".$this->appsecret;
????????????$res?=?$this->http_request($url);
????????????$result?=?json_decode($res,?true);
????????????$this->access_token?=?$result["access_token"];
????????????$mem->set($this->appid,?$this->access_token,?0,?3600);
????????}
????????//3.?本地寫入
????????$res?=?file_get_contents('access_token.json');
????????$result?=?json_decode($res,?true);
????????$this->expires_time?=?$result["expires_time"];
????????$this->access_token?=?$result["access_token"];
????????if?(time()?>?($this->expires_time?+?3600)){
????????????$url?=?"https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=".$this->appid."&secret=".$this->appsecret;
????????????$res?=?$this->http_request($url);
????????????$result?=?json_decode($res,?true);
????????????$this->access_token?=?$result["access_token"];
????????????$this->expires_time?=?time();
????????????file_put_contents('access_token.json',?'{"access_token":?"'.$this->access_token.'",?"expires_time":?'.$this->expires_time.'}');
????????}
????????//4.?實(shí)時(shí)拉取
????????$url?=?"https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=".$this->appid."&secret=".$this->appsecret;
????????$res?=?$this->http_request($url);
????????$result?=?json_decode($res,?true);
????????$this->access_token?=?$result["access_token"];
????????$this->expires_time?=?time();
????}
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