Code implementation of php getting token (WeChat)

The content of this article is about the code implementation of PHP to obtain token (WeChat). It has certain reference value. Friends in need can refer to it. I hope it will be helpful to you.

Interface call request description

https请求方式: GET
https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=APPID&secret=APPSECRET

Parameter description

Parameter	Is it necessary	illustrate
grant_type	yes	Get access_token and fill in client_credential
appid	yes	Unique Credentials for Third-Party Users
secret	yes	Third-party user unique credential key, 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}

Parameter Description

Parameter	illustrate
access_token	Obtained credentials
expires_in	Voucher validity time, unit: seconds

The above is the WeChat public account’s access_token document. This chapter briefly explains how to obtain the token in PHP and what to pay attention to.

1. The prepared parameters require a public account The appid and secret are two pieces of information. At the same time, it should be noted that after the secret is changed, what you save also needs to be changed, so it is not recommended to change it, just save it.

2. You need to set up a whitelist, which can be obtained based on the server's IP address. If you really don't know it, it doesn't matter, because you can know your own IP based on the error reported by the WeChat interface and then set it up.

3. The number of access_token calls per day is valid. If I remember correctly, it is 2K times per day, but the validity period of a token is 2 hours, so we must cache a token for 2 hours so that the interface will not be exceeded. number of calls.

<?php
    public function getAccessToken($appid,$secret){
        $url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid={$appid}&secret={$secret}";
        $res = $this->curl_get($url);
        $res = json_decode($res,1);
        if($res[&#39;errcode&#39;]!=0) throw new Exception($res[&#39;errmsg&#39;]);
        return $res[&#39;access_token&#39;];
    }
 public function curl_get($url) {
         $headers = array(&#39;User-Agent:Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.81 Safari/537.36&#39;);
        $oCurl = curl_init();
        if(stripos($url,"https://")!==FALSE){
            curl_setopt($oCurl, CURLOPT_SSL_VERIFYPEER, FALSE);
            curl_setopt($oCurl, CURLOPT_SSL_VERIFYHOST, FALSE);
            curl_setopt($oCurl, CURLOPT_SSLVERSION, 1); //CURL_SSLVERSION_TLSv1
        }
        curl_setopt($oCurl, CURLOPT_TIMEOUT, 20);
        curl_setopt($oCurl, CURLOPT_URL, $url);
        curl_setopt($oCurl, CURLOPT_HTTPHEADER, $headers);
        curl_setopt($oCurl, CURLOPT_RETURNTRANSFER, 1 );
        $sContent = curl_exec($oCurl);
        $aStatus = curl_getinfo($oCurl);
        curl_close($oCurl);
        if(intval($aStatus["http_code"])==200){
            return $sContent;
        }else{
            return false;
        }
    }

The above is the code for php to obtain the token, which is relatively easy.

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