How to judge the built-in browser of WeChat (implemented through User Agent)

When developing WeChat public accounts, a large part of it is the development of micro-sites. We need to know that the current browser is a built-in browser for WeChat. So how do you judge it?

User Agent with built-in browser of WeChat

How to judge the built-in browser of WeChat, first you need to obtain the User Agent of the built-in browser of WeChat. After detection by the WeChat browser on the iPhone, its User Agent is:

Mozilla/5.0 (iPhone; CPU iPhone OS 6_1_3 like Mac OS X) AppleWebKit/536.26 (KHTML, like Gecko) Mobile/10B329 MicroMessenger/5.0.1

So by identifying the keyword MicroMessenger, we can determine whether the browser is built-in to WeChat.

Judgement through JavaScript

function is_weixin(){
var ua = ();
if((/MicroMessenger/i)=="micromessenger") {
return true;
} else {
return false;
}
}

Judged by PHP

function is_weixin(){ 
if ( strpos($_SERVER['HTTP_USER_AGENT'], 'MicroMessenger') !== false ) {
return true;
} 
return false;
}