User Agent can be faked and its better not to depend upon user agent string rather then you can use a CSS3 media queries if you only want to detect orientation (you can explore the CSS of the famous responsive framework bootstrap to check how you can handle the orientation part using CSS)
Here is little CSS :
@media only screen and (max-width: 999px) {
/* rules that only apply for canvases narrower than 1000px */
}
@media only screen and (device-width: 768px) and (orientation: landscape) {
/* rules for iPad in landscape orientation */
}
@media only screen and (min-device-width: 320px) and (max-device-width: 480px) {
/* iPhone, Android rules here */
}
Read more : About CSS orientation detection
OR You can find the orientation using JavaScript :
// Listen for orientation changes
window.addEventListener("orientationchange", function() {
// Announce the new orientation number
alert(window.orientation);
}, false);
Read more : About detect orientation using JS
Finally if you really wants to go with user agent string then this code will help you alot, work fine almost on every browser :
<?php
class BrowserDetection {
private $_user_agent;
private $_name;
private $_version;
private $_platform;
private $_basic_browser = array (
'Trident\/7.0' => 'Internet Explorer 11',
'Beamrise' => 'Beamrise',
'Opera' => 'Opera',
'OPR' => 'Opera',
'Shiira' => 'Shiira',
'Chimera' => 'Chimera',
'Phoenix' => 'Phoenix',
'Firebird' => 'Firebird',
'Camino' => 'Camino',
'Netscape' => 'Netscape',
'OmniWeb' => 'OmniWeb',
'Konqueror' => 'Konqueror',
'icab' => 'iCab',
'Lynx' => 'Lynx',
'Links' => 'Links',
'hotjava' => 'HotJava',
'amaya' => 'Amaya',
'IBrowse' => 'IBrowse',
'iTunes' => 'iTunes',
'Silk' => 'Silk',
'Dillo' => 'Dillo',
'Maxthon' => 'Maxthon',
'Arora' => 'Arora',
'Galeon' => 'Galeon',
'Iceape' => 'Iceape',
'Iceweasel' => 'Iceweasel',
'Midori' => 'Midori',
'QupZilla' => 'QupZilla',
'Namoroka' => 'Namoroka',
'NetSurf' => 'NetSurf',
'BOLT' => 'BOLT',
'EudoraWeb' => 'EudoraWeb',
'shadowfox' => 'ShadowFox',
'Swiftfox' => 'Swiftfox',
'Uzbl' => 'Uzbl',
'UCBrowser' => 'UCBrowser',
'Kindle' => 'Kindle',
'wOSBrowser' => 'wOSBrowser',
'Epiphany' => 'Epiphany',
'SeaMonkey' => 'SeaMonkey',
'Avant Browser' => 'Avant Browser',
'Firefox' => 'Firefox',
'Chrome' => 'Google Chrome',
'MSIE' => 'Internet Explorer',
'Internet Explorer' => 'Internet Explorer',
'Safari' => 'Safari',
'Mozilla' => 'Mozilla'
);
private $_basic_platform = array(
'windows' => 'Windows',
'iPad' => 'iPad',
'iPod' => 'iPod',
'iPhone' => 'iPhone',
'mac' => 'Apple',
'android' => 'Android',
'linux' => 'Linux',
'Nokia' => 'Nokia',
'BlackBerry' => 'BlackBerry',
'FreeBSD' => 'FreeBSD',
'OpenBSD' => 'OpenBSD',
'NetBSD' => 'NetBSD',
'UNIX' => 'UNIX',
'DragonFly' => 'DragonFlyBSD',
'OpenSolaris' => 'OpenSolaris',
'SunOS' => 'SunOS',
'OS\/2' => 'OS/2',
'BeOS' => 'BeOS',
'win' => 'Windows',
'Dillo' => 'Linux',
'PalmOS' => 'PalmOS',
'RebelMouse' => 'RebelMouse'
);
function __construct($ua = '') {
if(empty($ua)) {
$this->_user_agent = (!empty($_SERVER['HTTP_USER_AGENT'])?$_SERVER['HTTP_USER_AGENT']:getenv('HTTP_USER_AGENT'));
}
else {
$this->_user_agent = $ua;
}
}
function detect() {
$this->detectBrowser();
$this->detectPlatform();
return $this;
}
function detectBrowser() {
foreach($this->_basic_browser as $pattern => $name) {
if( preg_match("/".$pattern."/i",$this->_user_agent, $match)) {
$this->_name = $name;
// finally get the correct version number
$known = array('Version', $pattern, 'other');
$pattern_version = '#(?<browser>' . join('|', $known).')[/ ]+(?<version>[0-9.|a-zA-Z.]*)#';
if (!preg_match_all($pattern_version, $this->_user_agent, $matches)) {
// we have no matching number just continue
}
// see how many we have
$i = count($matches['browser']);
if ($i != 1) {
//we will have two since we are not using 'other' argument yet
//see if version is before or after the name
if (strripos($this->_user_agent,"Version") < strripos($this->_user_agent,$pattern)){
@$this->_version = $matches['version'][0];
}
else {
@$this->_version = $matches['version'][1];
}
}
else {
$this->_version = $matches['version'][0];
}
break;
}
}
}
function detectPlatform() {
foreach($this->_basic_platform as $key => $platform) {
if (stripos($this->_user_agent, $key) !== false) {
$this->_platform = $platform;
break;
}
}
}
function getBrowser() {
if(!empty($this->_name)) {
return $this->_name;
}
}
function getVersion() {
return $this->_version;
}
function getPlatform() {
if(!empty($this->_platform)) {
return $this->_platform;
}
}
function getUserAgent() {
return $this->_user_agent;
}
function getInfo() {
return "<strong>Browser Name:</strong> {$this->getBrowser()}<br/>\n" .
"<strong>Browser Version:</strong> {$this->getVersion()}<br/>\n" .
"<strong>Browser User Agent String:</strong> {$this->getUserAgent()}<br/>\n" .
"<strong>Platform:</strong> {$this->getPlatform()}<br/>";
}
}
$obj = new BrowserDetection();
echo $obj->detect()->getInfo();
The above code works for me almost on every browser and i hope it will help you a bit.
