判断网页是否在微信浏览器中打开

js判断

function is_weixn(){var ua = navigator.userAgent.toLowerCase();if(ua.match(/MicroMessenger/i)=="micromessenger") {return true;} else {return false;}}

 PHP判断

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