How PHP Gets the client browser and operating system information

In a more intelligent program, PHP can obtain the client browser and operating system information, and then depending on the browser and system type, loading different pages to provide more personalized service.

Here we come together to learn how to use PHP to get client browser and operating system information, interested friends can refer to the next.

1, PHP Super global variable $_server array field [' Http_user_agent '] get access to all information of the user
The following is a string obtained by $_server[' Http_user_agent '):
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, using regular expressions to match the above string, the user's browser, operating system information.

3, PHP according to the matching string (the user's browser operating system information), the allocation of the required CSS, JS, etc., returned to the user

My browser and operating system information:
Browser:chrome 5.0
Platform:windows 7

A complete example is given below.
<?php
Display the browser information of the Access user
Echo ' Browser: '. Determinebrowser ($Agent). ' <BR> ';
Show access to the user's operating system platform
Echo ' Platform: '. Determineplatform ($Agent). ' <BR> ';

Link:http://www.jbxue.com
A positive value expression that is better than parsing the string in $_server[' Http_user_agent '] gets access to the user's browser information
function Determinebrowser ($Agent) {
$browseragent = ""; Browser
$browserversion = ""; Version of the browser
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 (' + ', $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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