<?php 
//Browser detect
// add new browsers in lower case here, separated
// by spaces -  order is important: from left to
// right browser family becomes more precise
$browsers = "mozilla msie gecko firefox ";
$browsers.= "konqueror safari netscape navigator ";
$browsers.= "opera mosaic lynx amaya omniweb";

$browsers = split(" ", $browsers);

$nua = strToLower( $_SERVER['HTTP_USER_AGENT']);

$l = strlen($nua);
for ($i=0; $i<count($browsers); $i++){
  $browser = $browsers[$i];
  $n = stristr($nua, $browser);
  if(strlen($n)>0){
   $GLOBALS["ver"] = "";
   $GLOBALS["nav"] = $browser;
   $j=strpos($nua, $GLOBALS["nav"])+$n+strlen($GLOBALS["nav"])+1;
   for (; $j<=$l; $j++){
     $s = substr ($nua, $j, 1);
     if(is_numeric($GLOBALS["ver"].$s) )
     $GLOBALS["ver"] .= $s;
     else
     break;
   }
  }
}

?>