Stop script running for spiders/bots

I am creating a small script to collect web stats and do not want it to run when spiders or bots are crawling my site.

At the moment I have lots of records in my database that are hits from spiders and bots and I am not interested in them.

Is there a PHP function I can use to determine if the requester is a human or a spider/bot?

 

Try something like:

For detecting if the visitor is a bot or not:

<?php
function is_bot(){
//array of bot names
$bots = array("Googlebot", "alexa", "msnbot");
if(in_array($_SERVER['HTTP_USER_AGENT'], $bots)){
return true;
} else {
return false;
}
}
?>

PHP:

Usage:

<?php
if(is_bot() == false){
//the visitor is not a bot...
} else {
//the visitor is a bot...
}
?>

PHP:

 

Many Thanks

 

I would say just ad the script url to a robots.txt
If you do not know about robots.txt google it