PHP gets user browser and system functions

//Operating system
Function Useros () {
$user _osagent = $_server[' http_user_agent '];

if (Strpos ($user _osagent, "NT 5.1")) {
$visitor _os = "Windows XP (SP2)";
} elseif (Strpos ($user _osagent, "NT 5.2") && Strpos ($user _osagent, "WOW64")) {
$visitor _os = "Windows XP 64 -bit Edition ";
} elseif (Strpos ($user _osagent, "NT 5.2")) {
$visitor _os = "Windows 2003";
} elseif (Strpos ($user _osagent, "NT 6.0")) {
$visitor _os = "Windows Vista";
} elseif (Strpos ($user _osagent, "NT 5.0")) {
$visitor _os = "Windows 2000";
} elseif (Strpos ($user _osagent, "4.9")) {
$visitor _os = "Windows ME";
} elseif (Strpos ($user _osagent, "NT 4")) {
$visitor _os = "Windows NT 4.0";
} elseif (Strpos ($user _osagent, ")" {
$visitor _os = "Windows 98";
} elseif (Strpos ($user _osagent, ")" {
$visitor _os = "Windows 95";
} elseif (Strpos ($user _osagent, Mac)) {
$visitor _os = "Mac";
} elseif (Strpos ($user _osagent, Linux)) {
$visitor _os = "LinUX ";
} elseif (Strpos ($user _osagent, "Unix")) {
$visitor _os = "Unix";
} elseif (Strpos ($user _osagent, "FreeBSD")) {
$visitor _os = "FreeBSD";
} elseif (Strpos ($user _osagent, "SunOS")) {
$visitor _os = "SunOS";
} elseif (Strpos ($user _osagent, "BeOS")) {
$visitor _os = "BeOS";
} elseif (Strpos ($user _osagent, "OS/2")) {
$visitor _os = "OS/2";
} elseif (Strpos ($user _osagent, PC)) {
$visitor _os = "Macintosh";
} elseif (Strpos ($user _osagent, "Aix")) {
$visitor _os = "Aix";
} elseif (Strpos ($user _osagent, "IBM OS/2")) {
$visitor _os = "IBM OS/2";
} elseif (Strpos ($user _osagent, "BSD")) {
$visitor _os = "BSD";
} elseif (Strpos ($user _osagent, "NetBSD")) {
$visitor _os = "NetBSD";
} else {
$visitor _os = "other";
}
return $visitor _os;
}
 

 

$visitor _browser = "Maxthon" ( Microsoft IE) "; }elseif (Strpos ($user _osagent, "Maxthon 2.0")) { $visitor _browser = "Maxthon 2.0"; }elseif (Strpos ($user _osagent, "Maxthon")) { $visitor _browser = "Maxthon"; }elseif (Strpos ($user _osagent, "MSIE 7.0")) { $visitor _browser = "MSIE 7.0"; }elseif (Strpos ($user _osagent, "MSIE 6.0")) { $visitor _browser = "MSIE 6.0"; } elseif (Strpos ($user _osagent, "MSIE 5.5")) { $visitor _browser = "MSIE 5.5"; } elseif (Strpos ($user _osagent, "MSIE 5.0")) { $visitor _browser = "MSIE 5.0"; } elseif (Strpos ($user _osagent, "MSIE 4.01")) { $visitor _browser = "MSIE 4.01"; } elseif (Strpos ($user _osagent, "Netcaptor")) { $visitor _browser = "Netcaptor"; } elseif (Strpos ($user _osagent, "Netscape") { $visitor _browser = "Netscape"; } elseif (Strpos ($user _osagent, "Lynx")) { $visitor _browser = "Lynx"; } elseif (Strpos ($user _osagent, "Opera")) { $visitor _browser = "Opera"; } elseif (Strpos ($user _osagent, "Konqueror")) { $visitor _browser = "Konqueror"; } elseif (Strpos ($user _osagent, "mozilla/5.0")) { $visitor _browser = "Mozilla"; } elseif (Strpos ($user _osagent, "U")) { $visitor _browser = "Firefox"; } else { $visitor _browser = "other"; } return $visitor _browser; }

$out _ieos = "Your operating system and browser information:". Useros (). ". Userbrowser ();

echo $out _ieos;