Автоопределение браузера(комп/тело)

if (isset($_SERVER["HTTP_USER_AGENT"]) && (eregi('windows', $_SERVER["HTTP_USER_AGENT"]) ||eregi('linux', $_SERVER["HTTP_USER_AGENT"]) ||eregi('bsd', $_SERVER["HTTP_USER_AGENT"]) ||eregi('x11', $_SERVER["HTTP_USER_AGENT"]) ||eregi('unix', $_SERVER["HTTP_USER_AGENT"]) ||eregi('macos', $_SERVER["HTTP_USER_AGENT"]) ||eregi('macintosh', $_SERVER["HTTP_USER_AGENT"]))){
$themesdir = "web";
$system_theme = $set_user['webskin'];
$set['skindef'] = $set['webskindef'];
}
else
{
$themesdir = "wap";
$system_theme = $set_user['wapskin'];
$set['skindef'] = $set['wapskindef'];
}


/////////////////////////////////////////////////////////
//  Версия по COOKIE                                   //
/////////////////////////////////////////////////////////
if (isset($_COOKIE['the']))
{
$the = $_COOKIE['the'];
}
if ($the=="web")
{
$themesdir = "web";
$system_theme = $set_user['webskin'];
$set['skindef'] = $set['webskindef'];
}
else
{
$themesdir = "wap";
$system_theme = $set_user['wapskin'];
$set['skindef'] = $set['wapskindef'];
}