PHP code used to obtain information about your browser and operating system

In order to accurately obtain information about the user's browser operating system, PHP loads different CSS files to different users for different requirements, such as different IE users. when a user accesses the SERVER, use the PHP Super global variable $ _ SERVER array field ['http _ USER_AGENT '] to obtain all information of the user accessing the SERVER.

$ _ SERVER ['http _ USER_AGENT '] string during my access:

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 preceding strings and users' browser operating system information

3. PHP allocates the necessary CSS files, JS files, and so on based on the matched string (the user's browser operating system information... Return to User

My browser operating system information
Browser: Google Chrome 5.0

Platform: Windows 7

The code is as follows:

The code is as follows:

// Display the browser information of the visitor
Echo 'Browser: '. determinebrowser ($ Agent ).'
';
// Display the operating system platform used to access the user
Echo 'platform: '. determineplatform ($ Agent ).'
';

// Parse a positive expression against the string in $ _ SERVER ['http _ USER_AGENT '] to obtain information about the browser used to access the user
Function determinebrowser ($ Agent ){
$ Browseragent = ""; // 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;
}

// Obtain the information of the browser used to access the user.
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 = "window 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 ('netsd', $ Agent )){
$ Browserplatform = "NetBSD ";
}
Elseif (eregi ('bsd', $ Agent )){
$ Browserplatform = "BSD ";
}
Elseif (ereg ('oss1', $ Agent )){
$ Browserplatform = "OSF1 ";
}
Elseif (ereg ('irix ', $ Agent )){
$ Browserplatform = "IRIX ";
}
Elseif (eregi ('freebsd ', $ Agent )){
$ Browserplatform = "FreeBSD ";
}
If ($ browserplatform = '') {$ browserplatform =" Unknown ";}
Return $ browserplatform;
}

?>