PHP Judging Browser Type program code _php tutorial

In PHP, if you want to determine the browser type operation method is very simple, we just take advantage of the global variable http_user_agent can get the user browser information, so we can use the regular to determine the type or browser version.

How PHP determines browser type and browser language because the browser sends some content that contains its own information (browser type, language) when it connects to the server.

Our main analysis here is _server["http_user_agent" (browser type) and _server["Http_accept_language" (browser language).
All we have to do is read it out and then use the Strpos or Preg_match function to compare it.
To determine the browser type:

The code is as follows	Copy Code

The first part of the PHP code, some are not very full, the need for friends themselves in the gourd painting scoop to add their own. (The following code has a small error, please read the article and modify it Yourself)

code as follows

copy code

if (Strpos ($_server["Http_user_agent"], "MSIE 9.0")) echo "Internet Explorer 9.0"; else if (Strpos ($_server["Http_user_agent"], "MSIE 8.0")) echo "Internet Explorer 8.0"; else if (Strpos ($_server["Http_user_agent"], "MSIE 7.0")) echo "Internet Explorer 7.0"; else if (Strpos ($_server["Http_user_agent"], "MSIE 6.0")) echo "Internet Explorer 6.0"; else if (Strpos ($_server["Http_user_agent"], "Firefox")) echo "Firefox"; else if (Strpos ($_server["Http_user_agent"], "Chrome")) echo "Chrome"; else if (Strpos ($_server["Http_user_agent"], "Safari")) echo "Safari"; else if (Strpos ($_server["Http_user_agent"], "Opera")) echo "Opera"; else echo $_server["Http_user_agent"]; ?>

Open Opera Browser, you can see its page request header information is as follows:

opera/9.80 (Windows NT 5.1; U Edition IBIS; ZH-CN) presto/2.10.229 version/11.61
But the value returned by Strpos ($_server["Http_user_agent", "Opera") is always "0"

The solution comparison is also relatively simple,

The code is as follows	Copy Code
else if (Strpos ($_server["Http_user_agent"], "Opera")) Replaced by else if (Strpos ($_server["Http_user_agent"], "Pera"))

The following is a stronger can be judged by the browser user or seo/seo.html "target=" _blank "> Search engine

code as follows

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Function My_get_browser () { if (empty ($_server[' http_user_agent ')) { Return ' command line, the robot is coming! '; } if (False!==strpos ($_server[' http_user_agent '), ' MSIE 9.0 ') { return ' Internet Explorer 9.0 '; } if (False!==strpos ($_server[' http_user_agent '), ' MSIE 8.0 ') { return ' Internet Explorer 8.0 '; } if (False!==strpos ($_server[' http_user_agent '), ' MSIE 7.0 ') { return ' Internet Explorer 7.0 '; } if (False!==strpos ($_server[' http_user_agent '), ' MSIE 6.0 ') { return ' Internet Explorer 6.0 '; } if (False!==strpos ($_server[' http_user_agent '), ' Firefox ') { return ' Firefox '; } if (False!==strpos ($_server[' http_user_agent '), ' Chrome ') { return ' chrome '; } if (False!==strpos ($_server[' http_user_agent '), ' Safari ') { return ' Safari '; } if (False!==strpos ($_server[' http_user_agent '), ' opera ') { return ' opera '; } if (False!==strpos ($_server[' http_user_agent '), ' 360SE ')} { return ' 360SE '; } }

http://www.bkjia.com/PHPjc/628724.html www.bkjia.com true http://www.bkjia.com/PHPjc/628724.html techarticle in PHP If you want to determine the browser type operation method is very simple, we just take advantage of the global variable http_user_agent can get the user browser information, so we can use the regular ...

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