i am sparticus: Browsers!!!

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<?php
/**first we've got to identfy the browser */
$toFind = "(";
$browser = str_replace( strchr($HTTP_USER_AGENT, $toFind), "", $HTTP_USER_AGENT);
/**the code above takes the first part out of the http user request, this will say the basics of the browser */
/**internet explorer work round */
/**due to msie identifying ie5.0 to ie6.0 as mozilla/4.0 we've got to work round that. So if the browser identifies as mozilla/4.0 we've then got to see if it's ie 6.0 or lower */
/**first we find out if the browser contains MSIE in it*/
$msiecheck = strpos($HTTP_USER_AGENT, "MSIE");
if ($msiecheck === false) {$msie = 'nay';} /**sets $msie as nay if it's not msie browser*/
else {$msie = 'yay';} /**sets $msie yay if it is msie browser*/
/**then we find out if the browser contains 6.0 in it*/
$msieversioncheck = strpos($HTTP_USER_AGENT, "6.0");
if ($msieversioncheck === false) {$msie6 = "nope";} /**sets $msie6 as nope if it's not version 6.0*/
else {$msie6 = "yay";} /**sets $msie6 as yay if it is 6.0 browser*/
/**that's the msie stuff set for use later. I may optimize this at somepoint so it'll only run if it's mozilla/4.0 but I'm not sure how to do that yet. So with that out of the way we can carry on*/
/** now we set the good browsers, that like css */
$goodbrowsers = ( 'Opera/7.01 Mozilla/5.0 Mozilla/6.0 Opera/7 Opera/6' );
/** I may add more to this list later, I've got to check which browsers I like and which I don't */
/**this is the part that checks to see if I have a browser from the list*/
$goodbrowsercheck = strpos($goodbrowsers, "$browser");
if ($goodbrowsercheck === false) {$goodorbad = 'bad';}
else {$goodorbad = 'good';}
/** now i've set everything I can start to use it all, this sets the $skin and newskin as what they should be.*/
if (!isset($newskin)) {
if ($msie == $msie6) $newskin=1;
elseif ($goodorbad == 'good') $newskin=1;
else $newskin=2;
}
elseif (isset($newskin)) {
$newskin=(int)$newskin;
if ($newskin<1) $newskin=1;
if ($newskin>2) $newskin=1;
} elseif (isset($skin)) {
$newskin=(int)$skin;
if ($skin<1) $newskin=1;
if ($skin>2) $newskin=1;
}
$skin=$newskin;
setcookie ('skin', "", time() - 3600);
setcookie('skin',$newskin,time()+(86400*365),'/');
setcookie('skin',$newskin,time()+(86400*365),'/','.iamsparticus.co.uk');
$skin=$newskin;
?>
<?php
print "$skin";
print "$HTTP_USER_AGENT";
?>