Overview
Access_token is the public number's globally unique ticket, the public number calls each interface to use the Access_token. Developers need to be properly saved. Access_token storage should be reserved for at least 512 character spaces. The validity period of the Access_token is currently 2 hours and needs to be refreshed periodically, and repeated acquisition will cause the last acquired access_token to fail.
Acquisition of Access_token
<?php
define ("APPID", "Your APPID");
Define ("Appsecret", "Your Appsecret");
$token _access_url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=". APPID. "&secret=". Appsecret;
$res = file_get_contents ($token _access_url); Gets the contents of the file or gets the content of the network request
//echo $res;
$result = Json_decode ($res, true); Accepts a JSON-formatted string and converts it to a PHP variable
$access _token = $result [' Access_token '];
echo $access _token;
Php>
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