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這篇文章主要介紹了微信公眾平臺開發(fā)如何實(shí)現(xiàn)自動更新微信access token,具有一定借鑒價(jià)值,感興趣的朋友可以參考下,希望大家閱讀完這篇文章之后大有收獲,下面讓小編帶著大家一起了解一下。
access_token是公眾號的全局唯一票據(jù),公眾號調(diào)用各接口時(shí)都需使用access_token。正常情況下access_token有效期為7200秒,重復(fù)獲取將導(dǎo)致上次獲取的access_token失效。
公眾號可以使用AppID和AppSecret調(diào)用本接口來獲取access_token。AppID和AppSecret可在開發(fā)模式中獲得(需要已經(jīng)成為開發(fā)者,且?guī)ぬ枦]有異常狀態(tài))。注意調(diào)用所有微信接口時(shí)均需使用https協(xié)議。
接口調(diào)用請求說明
http請求方式: GET https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=APPID&secret=APPSECRET
參數(shù)說明
參數(shù) | 是否必須 | 說明 |
---|---|---|
grant_type | 是 | 獲取access_token填寫client_credential |
appid | 是 | 第三方用戶唯一憑證 |
secret | 是 | 第三方用戶唯一憑證密鑰,既appsecret |
返回說明
正常情況下,微信會返回下述JSON數(shù)據(jù)包給公眾號:
{"access_token":"ACCESS_TOKEN","expires_in":7200}
三、實(shí)現(xiàn)
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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