sudo apt-get install conky

/**
 * Remplace les caractères spéciaux par leur plus proche
 * correspondance ASCII (sans accent)
 * 
 * @info http://www.mibhouse.org/pokemon_jojo
 *
 * @param string $str
 * @param string $encoding
 *
 * @return string $str
 */
function strtoascii($str, $encoding = 'utf-8') {
	mb_regex_encoding($encoding); // jeu de caractères courant pour les expressions rationnelles. 
 
	// Tableau des corespondance
	$str_ascii = array(
		'A'		=> 'ÀÁÂÃÄÅĀĂǍẠẢẤẦẨẪẬẮẰẲẴẶǺĄ',
		'a'		=> 'àáâãäåāăǎạảấầẩẫậắằẳẵặǻą',
		'C'		=> 'ÇĆĈĊČ',
		'c'		=> 'çćĉċč',
		'D'		=> 'ÐĎĐ',
		'd'		=> 'ďđ',
		'E'		=> 'ÈÉÊËĒĔĖĘĚẸẺẼẾỀỂỄỆ',
		'e'		=> 'èéêëēĕėęěẹẻẽếềểễệ',
		'G'		=> 'ĜĞĠĢ',
		'g'		=> 'ĝğġģ',
		'H'		=> 'ĤĦ',
		'h'		=> 'ĥħ',
		'I'		=> 'ÌÍÎÏĨĪĬĮİǏỈỊ',
		'J'		=> 'Ĵ',
		'j'		=> 'ĵ',
		'K'		=> 'Ķ',
		'k'		=> 'ķ',
		'L'		=> 'ĹĻĽĿŁ',
		'l'		=> 'ĺļľŀł',
		'N'		=> 'ÑŃŅŇ',
		'n'		=> 'ñńņňʼn',
		'O'		=> 'ÒÓÔÕÖØŌŎŐƠǑǾỌỎỐỒỔỖỘỚỜỞỠỢ',
		'o'		=> 'òóôõöøōŏőơǒǿọỏốồổỗộớờởỡợð',
		'R'		=> 'ŔŖŘ',
		'r'		=> 'ŕŗř',
		'S'		=> 'ŚŜŞŠ',
		's'		=> 'śŝşš',
		'T'		=> 'ŢŤŦ',
		't'		=> 'ţťŧ',
		'U'		=> 'ÙÚÛÜŨŪŬŮŰŲƯǓǕǗǙǛỤỦỨỪỬỮỰ',
		'u'		=> 'ùúûüũūŭůűųưǔǖǘǚǜụủứừửữự',
		'W'		=> 'ŴẀẂẄ',
		'w'		=> 'ŵẁẃẅ',
		'Y'		=> 'ÝŶŸỲỸỶỴ',
		'y'		=> 'ýÿŷỹỵỷỳ',
		'Z'		=> 'ŹŻŽ',
		'z'		=> 'źżž',
		// Ligatures
		'AE'		=> 'Æ',
		'ae'		=> 'æ',
		'OE'		=> 'Œ',
		'oe'		=> 'œ'
	);
 
	// Convertion
	foreach ($str_ascii as $k => $v) {
		$str = mb_ereg_replace('['.$v.']', $k, $str);
	}
 
	return $str;
}

/**
 * Permet de détecté le navigateur client utilisé
 * 
 * @info http://www.mibhouse.org/pokemon_jojo/
 * 
 * @param string $return Valeur de retour demandée
 *
 * @return string|array
 */
function get_browser_agent($return = false) {
	global $browser_agent;
 
	if($return)
		$return = strtolower($return);
 
	// Navigateurs connu
	if($return && $return == 'browsers') {
		return array(
			'firefox'	=> 'browser',
			'shiretoko'	=> 'browser', // nom de code de firefox 3.5 dev
			'msie'		=> 'browser',
			'opera'		=> 'browser',
			'chrome'	=> 'browser',
			'safari'	=> 'browser',
			'mozilla'	=> 'browser',
			'seamonkey'	=> 'browser',
			'konqueror'	=> 'browser',
			'netscape'	=> 'browser',
			'gecko'		=> 'browser',
			'navigator'	=> 'browser',
			'mosaic'	=> 'browser',
			'lynx'		=> 'browser',
			'amaya'		=> 'browser',
			'omniweb'	=> 'browser',
			'avant'		=> 'browser',
			'camino'	=> 'browser',
			'flock'		=> 'browser',
			'aol'		=> 'browser',
 
			'googlebot'	=> 'spider',
			'msnbot'	=> 'spider',
			'yahoo'		=> 'spider',
			'ask'		=> 'spider',
 
			'itunes'	=> 'other',
		);
	}
	// Plateforme connue
	else if($return && $return == 'platforms') {
		return array(
			'android'	=> array('android'),
			'freebsd'	=> array('freebsd'),
			'linux'		=> array('linux'),
			'iphone'	=> array('iphone'),
			'zune'		=> array('zune'),
			'mac'		=> array('macintosh', 'mac platform x', 'mac os x'),
			'win'		=> array('windows', 'win32'),
		);
	}
 
	if(!isset($browser_agent)) {
		$browser_agent = array(
			'name'		=> false,
			'version'	=> 0,
			'platform'	=> false,
			'userAgent' 	=> $_SERVER['HTTP_USER_AGENT'] 
		);
 
		// Navigateur + Version
		foreach(get_browser_agent('browsers') as $browser => $type) {
			if (preg_match("#($browser)[/ ]?([0-9.]*)#", strtolower($browser_agent['userAgent']), $match)) {
				$browser_agent['name'] = $match[1];
				// Hack safari
				if($browser_agent['name'] == 'safari' && preg_match("#version[/ ]?([0-9.]*)#", strtolower($browser_agent['userAgent']), $match)) {
					$browser_agent['version'] = $match[1];
				}
				else
					$browser_agent['version'] = $match[2];
 
				if($type == 'spider')
					$browser_agent['platform'] = $type;
 
				break;
			}
		}
 
		// OS
		if(!$browser_agent['platform']) {
			foreach(get_browser_agent('platforms') as $platform => $values) {
				if(!$browser_agent['platform']) {
					foreach($values as $value) {
						if (strpos(strtolower($browser_agent['userAgent']), $value)) {
							$browser_agent['platform'] = $platform;
							break;
						}
					}
				}
				else
					break;
			}
		}
	}
 
	if($return && isset($browser_agent[$return]))
		return $browser_agent[$return];
	else if(!$return)
		return $browser_agent;
	else
		return false;
}

<?php
$browser = get_browser_agent();
print_r($browser);
?>

Array
(
    [name] => opera
    [version] => 9.64
    [platform] => linux
    [userAgent] => Opera/9.64 (X11; Linux i686; U; fr) Presto/2.1.1
)

<?php
$browser_name = get_browser_agent('name');
print_r($browser_name);
?>

opera

<?php
// Detection du navigateur
$browser = get_browser_agent();
 
// Navigateurs autorisés (avec la version minimum requise)
$browser_allowed = array(
	'shiretoko'		=> '3.5',
	'firefox'		=> '3.0',
	'opera'		=> '9.0',
);
 
// Le navigateur est t'il autorisé?
if(array_key_exists($browser['name'], $browser_allowed) && version_compare($browser['version'], $browser_allowed[$browser['name']], '>='))
	$autorized = true; 
else
	$autorized = false; 
 
print_r($browser);
 
if($autorized)
	echo 'Votre navigateur est compatible. Vous êtes autorisé à accéder à l\'application.';
else
	echo 'Votre navigateur n\'est pas compatible. Vous n\'êtes pas autorisé à accéder à l\'application.';
?>

Array
(
    [name] => opera
    [version] => 9.64
    [platform] => linux
    [userAgent] => Opera/9.64 (X11; Linux i686; U; fr) Presto/2.1.1
)
Votre navigateur est compatible. Vous êtes autorisé à accéder à l'application.

00:00.0 Host bridge: Intel Corporation Mobile 4 Series Chipset Memory Controller Hub (rev 07)
00:01.0 PCI bridge: Intel Corporation Mobile 4 Series Chipset PCI Express Graphics Port (rev 07)
00:1a.0 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #4 (rev 03)
00:1a.1 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #5 (rev 03)
00:1a.2 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #6 (rev 03)
00:1a.7 USB Controller: Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #2 (rev 03)
00:1b.0 Audio device: Intel Corporation 82801I (ICH9 Family) HD Audio Controller (rev 03)
00:1c.0 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 1 (rev 03)
00:1c.1 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 2 (rev 03)
00:1c.2 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 3 (rev 03)
00:1c.5 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 6 (rev 03)
00:1d.0 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #1 (rev 03)
00:1d.1 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #2 (rev 03)
00:1d.2 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #3 (rev 03)
00:1d.7 USB Controller: Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #1 (rev 03)
00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev 93)
00:1f.0 ISA bridge: Intel Corporation ICH9M LPC Interface Controller (rev 03)
00:1f.2 SATA controller: Intel Corporation ICH9M/M-E SATA AHCI Controller (rev 03)
01:00.0 VGA compatible controller: nVidia Corporation Device 064c (rev a1)
03:00.0 Network controller: Atheros Communications Inc. AR928X Wireless Network Adapter (PCI-Express) (rev 01)
06:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 02)
07:01.0 FireWire (IEEE 1394): Ricoh Co Ltd R5C832 IEEE 1394 Controller (rev 05)
07:01.1 SD Host controller: Ricoh Co Ltd R5C822 SD/SDIO/MMC/MS/MSPro Host Adapter (rev 22)
07:01.2 System peripheral: Ricoh Co Ltd R5C843 MMC Host Controller (rev 12)
07:01.3 System peripheral: Ricoh Co Ltd R5C592 Memory Stick Bus Host Adapter (rev 12)
07:01.4 System peripheral: Ricoh Co Ltd xD-Picture Card Controller (rev ff)

Bus 008 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 007 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 004 Device 003: ID 08ff:1600 AuthenTec, Inc. AES1600
Bus 004 Device 002: ID 0b05:1751 ASUSTek Computer, Inc. 
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 005 Device 003: ID 04f2:b033 Chicony Electronics Co., Ltd 
Bus 005 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub