Hi guys im new here and I badly need help with a redirection script that im working on and need your advice.
My redirection script in PHP is meant to redirect people when they click on a link to my website to an affiliate link based on the url they are coming from, I also need the script to check to see if a search engine spider is visiting my website and to redirect to my homepage approprietly.
I have a decent script so far and this sounds easy enough but when i try to add multiple search engine spider ip adresses to the script it comes up with errors when i try to load my page.
My script is as follows:
Code:
<?
$source=getenv("HTTP_REFERER");
if( ($source=="REFERER URL HERE")||($source=="SECOND REFERER URL HERE") )
{
header("location:AFFILIATE LINK HERE");
}
?>
<?
$visitor = $_SERVER['REMOTE_ADDR'];
if (preg_match("/SPIDER IP HERE/",$visitor)) {
header('Location:HOMEPAGE LINK HERE');
} else {
header(' ');
};
?>
The first section of the code, the one with the affiliate link redirect, works fine but all i need to know is how to add more search engine spider ips to the script. Whenever i try to add more than one ip it comes up with an error, ive tried everything but nothing seems to work, can you help me out?
Badly Need Help With Redirection Script
Sorry, got to go... 
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