<?php
/**
* Parses a user agent string into its important parts
*
* @author Jesse G. Donat <donatj@gmail.com>
* @link https://github.com/donatj/PhpUserAgent
* @link http://donatstudios.com/PHP-Parser-HTTP_USER_AGENT
* @param string|null $u_agent User agent string to parse or null. Uses $_SERVER['HTTP_USER_AGENT'] on NULL
* @throws \InvalidArgumentException on not having a proper user agent to parse.
* @return string[] an array with browser, version and platform keys
*/
function parse_user_agent( $u_agent = null ) {
if( is_null($u_agent) ) {
if( isset($_SERVER['HTTP_USER_AGENT']) ) {
$u_agent = $_SERVER['HTTP_USER_AGENT'];
} else {
throw new \InvalidArgumentException('parse_user_agent requires a user agent');
}
}
$platform = null;
$browser = null;
$version = null;
$empty = array( 'platform' => $platform, 'browser' => $browser, 'version' => $version );
if( !$u_agent ) return $empty;
if( preg_match('/\((.*?)\)/im', $u_agent, $parent_matches) ) {
preg_match_all('/(?P<platform>BB\d+;|Android|CrOS|Tizen|iPhone|iPad|iPod|Linux|Macintosh|Windows(\ Phone)?|Silk|linux-gnu|BlackBerry|PlayBook|X11|(New\ )?Nintendo\ (WiiU?|3?DS)|Xbox(\ One)?)
(?:\ [^;]*)?
(?:;|$)/imx', $parent_matches[1], $result, PREG_PATTERN_ORDER);
$priority = array( 'Xbox One', 'Xbox', 'Windows Phone', 'Tizen', 'Android', 'CrOS', 'X11' );
$result['platform'] = array_unique($result['platform']);
if( count($result['platform']) > 1 ) {
if( $keys = array_intersect($priority, $result['platform']) ) {
$platform = reset($keys);
} else {
$platform = $result['platform'][0];
}
} elseif( isset($result['platform'][0]) ) {
$platform = $result['platform'][0];
}
}
if( $platform == 'linux-gnu' || $platform == 'X11' ) {
$platform = 'Linux';
} elseif( $platform == 'CrOS' ) {
$platform = 'Chrome OS';
}
preg_match_all('%(?P<browser>Camino|Kindle(\ Fire)?|Firefox|Iceweasel|IceCat|Safari|MSIE|Trident|AppleWebKit|
TizenBrowser|Chrome|Vivaldi|IEMobile|Opera|OPR|Silk|Midori|Edge|CriOS|UCBrowser|Puffin|SamsungBrowser|
Baiduspider|Googlebot|YandexBot|bingbot|Lynx|Version|Wget|curl|
Valve\ Steam\ Tenfoot|
NintendoBrowser|PLAYSTATION\ (\d|Vita)+)
(?:\)?;?)
(?:(?:[:/ ])(?P<version>[0-9A-Z.]+)|/(?:[A-Z]*))%ix',
$u_agent, $result, PREG_PATTERN_ORDER);
// If nothing matched, return null (to avoid undefined index errors)
if( !isset($result['browser'][0]) || !isset($result['version'][0]) ) {
if( preg_match('%^(?!Mozilla)(?P<browser>[A-Z0-9\-]+)(/(?P<version>[0-9A-Z.]+))?%ix', $u_agent, $result) ) {
return array( 'platform' => $platform ?: null, 'browser' => $result['browser'], 'version' => isset($result['version']) ? $result['version'] ?: null : null );
}
return $empty;
}
if( preg_match('/rv:(?P<version>[0-9A-Z.]+)/si', $u_agent, $rv_result) ) {
$rv_result = $rv_result['version'];
}
$browser = $result['browser'][0];
$version = $result['version'][0];
$lowerBrowser = array_map('strtolower', $result['browser']);
$find = function ( $search, &$key, &$value = null ) use ( $lowerBrowser ) {
$search = (array)$search;
foreach( $search as $val ) {
$xkey = array_search(strtolower($val), $lowerBrowser);
if( $xkey !== false ) {
$value = $val;
$key = $xkey;
return true;
}
}
return false;
};
$key = 0;
$val = '';
if( $browser == 'Iceweasel' || strtolower($browser) == 'icecat' ) {
$browser = 'Firefox';
} elseif( $find('Playstation Vita', $key) ) {
$platform = 'PlayStation Vita';
$browser = 'Browser';
} elseif( $find(array( 'Kindle Fire', 'Silk' ), $key, $val) ) {
$browser = $val == 'Silk' ? 'Silk' : 'Kindle';
$platform = 'Kindle Fire';
if( !($version = $result['version'][$key]) || !is_numeric($version[0]) ) {
$version = $result['version'][array_search('Version', $result['browser'])];
}
} elseif( $find('NintendoBrowser', $key) || $platform == 'Nintendo 3DS' ) {
$browser = 'NintendoBrowser';
$version = $result['version'][$key];
} elseif( $find('Kindle', $key, $platform) ) {
$browser = $result['browser'][$key];
$version = $result['version'][$key];
} elseif( $find('OPR', $key) ) {
$browser = 'Opera Next';
$version = $result['version'][$key];
} elseif( $find('Opera', $key, $browser) ) {
$find('Version', $key);
$version = $result['version'][$key];
} elseif( $find('Puffin', $key, $browser) ) {
$version = $result['version'][$key];
if( strlen($version) > 3 ) {
$part = substr($version, -2);
if( ctype_upper($part) ) {
$version = substr($version, 0, -2);
$flags = array( 'IP' => 'iPhone', 'IT' => 'iPad', 'AP' => 'Android', 'AT' => 'Android', 'WP' => 'Windows Phone', 'WT' => 'Windows' );
if( isset($flags[$part]) ) {
$platform = $flags[$part];
}
}
}
} elseif( $find(array( 'IEMobile', 'Edge', 'Midori', 'Vivaldi', 'SamsungBrowser', 'Valve Steam Tenfoot', 'Chrome' ), $key, $browser) ) {
$version = $result['version'][$key];
} elseif( $rv_result && $find('Trident', $key) ) {
$browser = 'MSIE';
$version = $rv_result;
} elseif( $find('UCBrowser', $key) ) {
$browser = 'UC Browser';
$version = $result['version'][$key];
} elseif( $find('CriOS', $key) ) {
$browser = 'Chrome';
$version = $result['version'][$key];
} elseif( $browser == 'AppleWebKit' ) {
if( $platform == 'Android' && !($key = 0) ) {
$browser = 'Android Browser';
} elseif( strpos($platform, 'BB') === 0 ) {
$browser = 'BlackBerry Browser';
$platform = 'BlackBerry';
} elseif( $platform == 'BlackBerry' || $platform == 'PlayBook' ) {
$browser = 'BlackBerry Browser';
} else {
$find('Safari', $key, $browser) || $find('TizenBrowser', $key, $browser);
}
$find('Version', $key);
$version = $result['version'][$key];
} elseif( $pKey = preg_grep('/playstation \d/i', array_map('strtolower', $result['browser'])) ) {
$pKey = reset($pKey);
$platform = 'PlayStation ' . preg_replace('/[^\d]/i', '', $pKey);
$browser = 'NetFront';
}
return array( 'platform' => $platform ?: null, 'browser' => $browser ?: null, 'version' => $version ?: null );
}