判断H5页面是否在微信内

/**
 * 判断H5页面是否在微信内
 */
public static function h5InWechat()
{
    if (isset($_SERVER['HTTP_USER_AGENT']) && strpos($_SERVER['HTTP_USER_AGENT'],'MicroMessenger') !== false ) {
        return true;
    }
    return false;
}