Visitor lookup using php

visitor_lookup.php

<?php

function user_agent($user_agent) {

    $os_platform    =   "Unknown OS Platform";

    $browser        =   "Unknown Browser";

    $os_array       =   array(
                            'windows nt 10.0'	=> 'Windows 10',
							'windows nt 6.3'	=> 'Windows 8.1',
							'windows nt 6.2'	=> 'Windows 8',
							'windows nt 6.1'	=> 'Windows 7',
							'windows nt 6.0'	=> 'Windows Vista',
							'windows nt 5.2'	=> 'Windows 2003',
							'windows nt 5.1'	=> 'Windows XP',
							'windows nt 5.0'	=> 'Windows 2000',
							'windows nt 4.0'	=> 'Windows NT 4.0',
							'winnt4.0'			=> 'Windows NT 4.0',
							'winnt 4.0'			=> 'Windows NT',
							'winnt'				=> 'Windows NT',
							'windows 98'		=> 'Windows 98',
							'win98'				=> 'Windows 98',
							'windows 95'		=> 'Windows 95',
							'win95'				=> 'Windows 95',
							'windows phone'		=> 'Windows Phone',
							'android'			=> 'Android',
							'blackberry'		=> 'BlackBerry',
							'iphone'			=> 'iOS',
							'ipad'				=> 'iOS',
							'ipod'				=> 'iOS',
							'os x'				=> 'Mac OS X',
							'ppc mac'			=> 'Power PC Mac',
							'freebsd'			=> 'FreeBSD',
							'ppc'				=> 'Macintosh',
							'linux'				=> 'Linux',
							'debian'			=> 'Debian',
							'sunos'				=> 'Sun Solaris',
							'beos'				=> 'BeOS',
							'apachebench'		=> 'ApacheBench',
							'aix'				=> 'AIX',
							'irix'				=> 'Irix',
							'osf'				=> 'DEC OSF',
							'hp-ux'				=> 'HP-UX',
							'netbsd'			=> 'NetBSD',
							'bsdi'				=> 'BSDi',
							'openbsd'			=> 'OpenBSD',
							'gnu'				=> 'GNU/Linux',
							'unix'				=> 'Unknown Unix OS',
							'symbian' 			=> 'Symbian OS'
                        );

    $browser_array  =   array(
                            'OPR'			=> 'Opera',
							'Flock'			=> 'Flock',
							'Chrome'		=> 'Chrome',
							'Opera.*?Version'	=> 'Opera',
							'Opera'			=> 'Opera',
							'MSIE'			=> 'Internet Explorer',
							'Internet Explorer'	=> 'Internet Explorer',
							'Trident.* rv'	=> 'Internet Explorer',
							'Shiira'		=> 'Shiira',
							'Firefox'		=> 'Firefox',
							'Chimera'		=> 'Chimera',
							'Phoenix'		=> 'Phoenix',
							'Firebird'		=> 'Firebird',
							'Camino'		=> 'Camino',
							'Netscape'		=> 'Netscape',
							'OmniWeb'		=> 'OmniWeb',
							'Safari'		=> 'Safari',
							'Konqueror'		=> 'Konqueror',
							'icab'			=> 'iCab',
							'Lynx'			=> 'Lynx',
							'Links'			=> 'Links',
							'hotjava'		=> 'HotJava',
							'amaya'			=> 'Amaya',
							'IBrowse'		=> 'IBrowse',
							'Maxthon'		=> 'Maxthon',
							'Ubuntu'		=> 'Ubuntu Web Browser'
                        );

    foreach ($os_array as $regex => $value) { 

        if (preg_match('/'.$regex.'/i', $user_agent)) {
            $os_platform    =   $value;
        }

    }

    foreach ($browser_array as $regex => $value) { 

        if (preg_match('/'.$regex.'/i', $user_agent)) {
            $browser    =   $value;
        }

    }

    return $os_platform.'~'.$browser;

}

$user_agent = explode('~', user_agent($_SERVER['HTTP_USER_AGENT']));

$json = file_get_contents('http://freegeoip.net/json/'.$_SERVER['REMOTE_ADDR']);

$user_lookup = json_decode($json);

$os = $user_agent[0];

$browser = $user_agent[1];

$ip = $user_lookup->ip;

$country = $user_lookup->country_name.' <img width="15" src="http://flagpedia.net/data/flags/small/'.strtolower($user_lookup->country_code).'.png">';

$region = $user_lookup->region_name;

$city = $user_lookup->city;

$time_zone = $user_lookup->time_zone;

$map = '<img width="500" src="https://maps.googleapis.com/maps/api/staticmap?center='.$user_lookup->latitude.','.$user_lookup->longitude.'&amp;zoom=9&amp;size=640x200&amp;sensor=false">';

$html = '<table><tr><td>IP</td><td>Browser</td><td>OS</td><td>Country</td><td>Region</td><td>City</td><td>Time Zone</td><td>Map</td></tr>';

$html .= '<tr><td>'.$ip.'</td><td>'.$browser.'</td><td>'.$os.'</td><td>'.$country.'</td><td>'.$region.'</td><td>'.$city.'</td><td>'.$time_zone.'</td><td>'.$map.'</td></tr></table>';

echo $html;

?>