Internet Explorer:禁止访问者访问

尝试

php有函数 $_SERVER['HTTP_USER_AGENT'] 用于识别浏览器

 if(using_ie())
 {
   //redirect
 }
function using_ie() 
    { 
        $u_agent = $_SERVER['HTTP_USER_AGENT']; 
        $ub = False; 
        if(preg_match('/MSIE/i',$u_agent)) 
        { 
            $ub = True; 
        } 

        return $ub; 
    } 

您也可以使用

if (strpos($_SERVER['HTTP_USER_AGENT'], 'MSIE') !== false) {
  header('Location: /index-ie.php');
  exit;
}