Código para saber si un cliente acepta coockies:

$navegador = get_browser(null, true);

if ($navegador["cookies"]){
echo “<p>Permite el uso de cookies ” . $navegador["cookies"];
}else{
echo “<p>NO permite usar cookies ” . $navegador["cookies"];
}

Para poder ver toda la información del navegador, mediante php

<?php

$browser = get_browser(null, true);

print_r($browser);

echo $browser["parent"];

?>

Librería:

browser_name_regex => ^mozilla/4\.0 (compatible; msie 7\.0; .*windows nt 5\.1.*).*$
browser_name_pattern => Mozilla/4.0 (compatible; MSIE 7.0; *Windows NT 5.1*)*
parent => IE 7.0
platform => WinXP
browser => IE
version => 7.0
majorver => 7
win32 => 1
frames => 1
iframes => 1
tables => 1
cookies => 1
backgroundsounds => 1
cdf => 1
vbscript => 1
javaapplets => 1
javascript => 1
activexcontrols => 1
css => 2
cssversion => 2
supportscss => 1
minorver => 0
alpha =>
beta =>
win16 =>
win64 =>
authenticodeupdate =>
stripper =>
isbanned =>
wap =>
ismobiledevice =>
issyndicationreader =>
crawler =>
aol =>
aolversion => 0
netclr =>
clrversion => 0