HTTP Referrer Redirect not working :(

[dombrorj]

I'm trying to redirect visitors that contain broadly matched URLs. For example, redirect the visitor if their url contains: "/welcome" or "order.php" or "login.mysite/"

 

At the same time I also want to redirect the user if they a particular User Agent.

 

Here's what I have, but doesn't seem to be entirely working...

 

<?php

//detect referrer
$ref = $_SERVER['HTTP_REFERER'];
$find = "order.php";
$find = "login.mysite/";

//setting the variables
$linux = stripos($_SERVER['HTTP_USER_AGENT'],"Linux");
$aol = stripos($_SERVER['HTTP_USER_AGENT'],"AOL");

//detecting user agent device, os, browser, etc.
if ($linux == true || $aol == true) $redirect = 1;

//detect referrer
elseif (preg_match($ref, $find)) $redirect = 1;

//set redirects
if ($redirect) {	
    $url = "http://www.google.com";
} 
else {
    $url = "http://www.yahoo.com";
}

header("Location: $url");

?>

 

Any help you can offer is appreciated. Thanks!

[gizmola]

Here's what I have, but doesn't seem to be entirely working...

 

This is not a helpful description of your problem.  Exactly what works and what doesn't work?

[requinix]

1. You can't have multiple values for $find. Check each one, one at a time.

2. Use strpos instead of preg_match().

[KevinM1]

You're also not guaranteed that HTTP_REFERER will work, or contain the value you want: http://php.net/manual/en/reserved.variables.server.php

 

The address of the page (if any) which referred the user agent to the current page. This is set by the user agent. Not all user agents will set this, and some provide the ability to modify HTTP_REFERER as a feature. In short, it cannot really be trusted.

[dombrorj]

1. You can't have multiple values for $find. Check each one, one at a time.

2. Use strpos instead of preg_match().

 

Thanks! I got it to work with your suggestions (code below)

 

You're also not guaranteed that HTTP_REFERER will work, or contain the value you want: http://php.net/manual/en/reserved.variables.server.php

 

Yeah, I know its not perfect but it'll have to do. Thanks for pointing me to that.

 

Thanks for the help! Here's what I ended up with and seems to be working...

 

<?php

//detect referrer
$ref = $_SERVER['HTTP_REFERER'];

//setting the user agent variables
$linux = stripos($_SERVER['HTTP_USER_AGENT'],"Linux");
$sample = stripos($_SERVER['HTTP_USER_AGENT'],"SAMPLE");

//detecting user agent device, os, browser, etc.
if ($linux == true || $sample == true) $redirect = 1;

//detect referrer
if (stristr($ref , "order.php")) $redirect = 1;
if (stristr($ref , "login.mysite")) $redirect = 1;


//set redirects
if ($redirect) {	
    $url = "http://www.google.com";
} 
else {
    $url = "http://www.yahoo.com";
}

header("Location: $url");

?>

[requinix]

Don't use stristr(). If you need it case-insensitive then use stripos.

[dombrorj]

Don't use stristr(). If you need it case-insensitive then use stripos.

 

Ok, thanks for catching that.