//判断是否 微信浏览器
function isWeixin1() {
    if (strpos($_SERVER['HTTP_USER_AGENT'], 'MicroMessenger') !== false) {
        return true;
    } else {
        return false;
    }
}
//判断是PC还是wap
function isMobile1(){
    if (isset ($_SERVER['HTTP_X_WAP_PROFILE'])) return true;
    if(isset ($_SERVER['HTTP_CLIENT']) &&'PhoneClient'==$_SERVER['HTTP_CLIENT']) return true;
    if (isset ($_SERVER['HTTP_VIA'])) return stristr($_SERVER['HTTP_VIA'], 'wap') ? true : false;
    if (isset ($_SERVER['HTTP_USER_AGENT'])) {
        $clientkeywords = array(
            'nokia','sony','ericsson','mot','samsung','htc','sgh','lg','sharp','sie-','philips','panasonic','alcatel','lenovo','iphone','ipod','blackberry','meizu','android','netfront','symbian','ucweb','windowsce','palm','operamini','operamobi','openwave','nexusone','cldc','midp','wap','mobile'
        );
        if (preg_match("/(" . implode('|', $clientkeywords) . ")/i", strtolower($_SERVER['HTTP_USER_AGENT']))) {
            return true;
        }
    }
    if (isset ($_SERVER['HTTP_ACCEPT'])) {
        if ((strpos($_SERVER['HTTP_ACCEPT'],
                    'vnd.wap.wml') !== false) && (strpos($_SERVER['HTTP_ACCEPT'],
                    'text/html') === false || (strpos($_SERVER['HTTP_ACCEPT'],
                        'vnd.wap.wml') < strpos($_SERVER['HTTP_ACCEPT'],
                        'text/html')))) {
            return true;
        }
    }
    return false;
}