Shulou(Shulou.com)06/03 Report--

This article mainly introduces the Wechat public platform development how to automatically update Wechat access token, has a certain reference value, interested friends can refer to, I hope you can learn a lot after reading this article, the following let the editor take you to know about it.

1. Access Token

Access_token is the global unique ticket of the official account, which needs to use access_token when calling each interface. Under normal circumstances, the access_token is valid for 7200 seconds. Repeated acquisition will invalidate the last acquired access_token.

The official account can use AppID and AppSecret to call this API to obtain access_token. AppID and AppSecret are available in the development mode (you need to be a developer and the account has no abnormal status). Note that https protocol is required when calling all Wechat APIs.

API call request description

Http request method: GET https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=APPID&secret=APPSECRET

Parameter description

Whether the parameter must indicate whether grant_type is obtained by access_token. Fill in that client_credentialappid is the only credential key for third-party users. Secret is the unique credential key for third-party users, that is, appsecret.

Return description

Normally, Wechat will return the following JSON packets to the official account:

{"access_token": "ACCESS_TOKEN", "expires_in": 7200}

III. Realization

Class class_weixin {var $appid = APPID; var $appsecret = APPSECRET; / / constructor, get Access Token public function _ construct ($appid = NULL, $appsecret = NULL) {if ($appid & & $appsecret) {$this- > appid = $appid; $this- > appsecret = $appsecret;} / / 1. Database form / * DROP TABLE IF EXISTS `wx_ token`; CREATE TABLE IF NOT EXISTS `wx_ token` (`id` int (1) NOT NULL, `type` varchar (20) NOT NULL, `valure` varchar (16) NOT NULL, `value` varchar (600) NOT NULL, PRIMARY KEY (`id`) ENGINE=MyISAM DEFAULT CHARSET=utf8 INSERT INTO `wx_ token` (`id`, `type`, `roomre`, `value`) VALUES (1, 'access_token',' 1425534992), 't3oyW9fRnOWKQHQhZXoEHmurpgThhjmnCqTVpaLyUD'), (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 "] $this- > expires_time = time (); mysql_query ("UPDATE `wx_ token` SET `valure` ='$this- > expires_time', `value` ='$this- > access_token' WHERE `type` = 'access_token';");} / / 2. Cache form if (isset ($_ SERVER ['HTTP_APPNAME'])) {/ / SAE environment, memcache $mem = memcache_init ();} else {/ / local environment, 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. Local write $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. Real-time pull $url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=".$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 () } Thank you for reading this article carefully. I hope the article "how to automatically update Wechat access token in the development of Wechat public platform" shared by the editor will be helpful to everyone. At the same time, I also hope that you will support and follow the industry information channel. More related knowledge is waiting for you to learn!

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