WeChat Pay

1. SSL Minimum Version Requirement for Servers

As lower-versions of SSL encryption are more susceptible to vulnerabilities, developers should confirm whether their SSL version requires an update. For more information, see the update notice in the WeChat Official Account Admin Platform：http://mp.weixin.qq.com/cgi-bin/announce?action=getannouncement&key=1414562353&version=11&lang=zh_CN

Java-based developers can also refer to the instructions on the Oracle website: [Oracle Java disables SSL3](https://www.oracle.com/technetwork/java/javase/documentation/cve-2014-3566-2342133.html)

2. IPv6 Requirements

If you have enabled IPv6, the IP of your site on as stored on our servers will be an IPv6 address. As IPv6 is not supported throughout the internet globally, you may face potentially long connection timeouts on IPv6.

We suggest you use IPv4 to resolve addresses when calling payment APIs.

How to use curl for PHP programing:

 if(defined('CURLOPT_IPRESOLVE') && defined('CURL_IPRESOLVE_V4')){
		curl_setopt($ch, CURLOPT_IPRESOLVE, CURL_IPRESOLVE_V4);