Redirecting to a new page when a user is using Internet Explorer

I am using the code below in order to redirect the users who use Internet Explorer to a new page, but obviously there is something wrong with the code, since the site doesn't load anymore when I 开发者_开发问答am using Internet Explorer.

Here is the code:

<?php
if (strpos($_SERVER['HTTP_USER_AGENT'], 'MSIE') !== FALSE) {
    $url = htmlspecialchars($_GET['url']);
    header( 'Location: http://'.$url.'' ) ;
    }
    ?>

Since I don't know what I am doing wrong it would be greatly appreciated if someone could post the right way to do it with the right coding.

Thanks in advance.

---

You can use get_browser() to get the user browser and then use the if condition.

You can try this:

$browser = get_browser(null, true);
if($browser['browser'] == "Internet Explorer"){
    $url = htmlspecialchars($_GET['url']);
    header( 'Location: http://'.$url.'' );
} else {
    // do something...
}

---

strpos($_SERVER['HTTP_USER_AGENT'], 'MSIE') !== FALSE)

!== typo ? It should be something like

strpos($_SERVER['HTTP_USER_AGENT'], 'MSIE') == TRUE)

---

For modern IE you can use:

if (strpos($_SERVER['HTTP_USER_AGENT'], 'Trident') !== false) {
    header('Location: ie-page.php');
    exit;
} else {
    print "Hello World";
}