php internet explorer redirect header无法正常工作

Question

im trying to redirect users to another page if they are using internet explorer but this code doen't redirect them it loads the page up as normal on i.e.

I have tried different variations of MSIE but nothing seems to work

session_start();

  if (strpos($_SERVER['HTTP_USER_AGENT'], '/MSIE/i') !== false){
header('Location: /ie.php');
die();
}else{
echo "User Agent not recognised.";
}

any one have any ideas?

Answer 1

try this:

session_start();

if (strpos($_SERVER['HTTP_USER_AGENT'], 'MSIE') !== false){
    header('Location: /ie.php');
    die();
}else{
    echo "User Agent not recognised.";
}

The reason is that strpos's second parameter, the needle, is not supposed to be a regular expression.