PHP code to get information about the user's browser and operating system

  • 2020-05-19 04:23:58
  • OfStack

1. When the user accesses the server, the field ['HTTP_USER_AGENT'] in the PHP super global variable $_SERVER array is used to get all the information of the user

$_SERVER['HTTP_USER_AGENT'] string when I accessed:

Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US) AppleWebKit/533.2 (KHTML, like Gecko) Chrome/5.0.342.3 Safari/533.2

2. Use regular expressions to match the above strings and the user's browser operating system information

3.PHP allocates required CSS files,JS and so on according to the matched string (the user's browser operating system information). Back to the user

My browser operating system information
Browser: Chrome 5.0

Platform: Windows 7

The code is as follows:


<?php
// Displays the browser information of the accessing user 
echo 'Browser: ' . determinebrowser($Agent) . '<BR>';
// Displays the operating system platform of the accessing user 
echo 'Platform: ' . determineplatform($Agent). '<BR>';
// Positive expressions are compared to parsing $_SERVER['HTTP_USER_AGENT'] String in   Gets information about the browser that accesses the user 
function determinebrowser ($Agent) {
$browseragent="";   // The browser 
$browserversion=""; // Browser version 
if (ereg('MSIE ([0-9].[0-9]{1,2})',$Agent,$version)) {
 $browserversion=$version[1];
 $browseragent="Internet Explorer";
} else if (ereg( 'Opera/([0-9]{1,2}.[0-9]{1,2})',$Agent,$version)) {
 $browserversion=$version[1];
 $browseragent="Opera";
} else if (ereg( 'Firefox/([0-9.]{1,5})',$Agent,$version)) {
 $browserversion=$version[1];
 $browseragent="Firefox";
}else if (ereg( 'Chrome/([0-9.]{1,3})',$Agent,$version)) {
 $browserversion=$version[1];
 $browseragent="Chrome";
}
else if (ereg( 'Safari/([0-9.]{1,3})',$Agent,$version)) {
 $browseragent="Safari";
 $browserversion="";
}
else {
$browserversion="";
$browseragent="Unknown";
}
return $browseragent." ".$browserversion;
}
//  Similarly, get access to the user's browser information 
function determineplatform ($Agent) {
$browserplatform=='';
if (eregi('win',$Agent) && strpos($Agent, '95')) {
$browserplatform="Windows 95";
}
elseif (eregi('win 9x',$Agent) && strpos($Agent, '4.90')) {
$browserplatform="Windows ME";
}
elseif (eregi('win',$Agent) && ereg('98',$Agent)) {
$browserplatform="Windows 98";
}
elseif (eregi('win',$Agent) && eregi('nt 5.0',$Agent)) {
$browserplatform="Windows 2000";
}
elseif (eregi('win',$Agent) && eregi('nt 5.1',$Agent)) {
$browserplatform="Windows XP";
}
elseif (eregi('win',$Agent) && eregi('nt 6.0',$Agent)) {
$browserplatform="Windows Vista";
}
elseif (eregi('win',$Agent) && eregi('nt 6.1',$Agent)) {
$browserplatform="Windows 7";
}
elseif (eregi('win',$Agent) && ereg('32',$Agent)) {
$browserplatform="Windows 32";
}
elseif (eregi('win',$Agent) && eregi('nt',$Agent)) {
$browserplatform="Windows NT";
}elseif (eregi('Mac OS',$Agent)) {
$browserplatform="Mac OS";
}
elseif (eregi('linux',$Agent)) {
$browserplatform="Linux";
}
elseif (eregi('unix',$Agent)) {
$browserplatform="Unix";
}
elseif (eregi('sun',$Agent) && eregi('os',$Agent)) {
$browserplatform="SunOS";
}
elseif (eregi('ibm',$Agent) && eregi('os',$Agent)) {
$browserplatform="IBM OS/2";
}
elseif (eregi('Mac',$Agent) && eregi('PC',$Agent)) {
$browserplatform="Macintosh";
}
elseif (eregi('PowerPC',$Agent)) {
$browserplatform="PowerPC";
}
elseif (eregi('AIX',$Agent)) {
$browserplatform="AIX";
}
elseif (eregi('HPUX',$Agent)) {
$browserplatform="HPUX";
}
elseif (eregi('NetBSD',$Agent)) {
$browserplatform="NetBSD";
}
elseif (eregi('BSD',$Agent)) {
$browserplatform="BSD";
}
elseif (ereg('OSF1',$Agent)) {
$browserplatform="OSF1";
}
elseif (ereg('IRIX',$Agent)) {
$browserplatform="IRIX";
}
elseif (eregi('FreeBSD',$Agent)) {
$browserplatform="FreeBSD";
}
if ($browserplatform=='') {$browserplatform = "Unknown"; }
return $browserplatform;
}
?>


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