把下面的代码放在app\common.php公共方法那里。

 function isMobile()
{
    if (isset($_SERVER['HTTP_X_WAP_PROFILE'])) {
        return true;
    }
    if (isset($_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($_SERVER['HTTP_ACCEPT'], 'textml') === false || (strpos($_SERVER['HTTP_ACCEPT'], 'vnd.wap.wml') < strpos($_SERVER['HTTP_ACCEPT'], 'textml')))) {
            return true;
        }
    }
    return false;
}

在pc模块common控制器中写入

 public function initialize()
    {
        if(isMobile()){
            $this->redirect('wap/index/index');
        }
     
    }

在wap模块common控制器中写入

public function initialize()
    {
        if(!isMobile()){
            $this->redirect('index/index/index');
        }
      

    }