Update Browser Notification in PHP [duplicate] - php

Question

This question already has answers here:
Determine Browser's Version
(4 answers)
Closed 9 years ago.
could you please tell me that how do I implement a Update Your Browser notification in php? Actually I'm developing a web app, which is fully done with html5, so I wanna show a notification to those users, who does not have an updated browser, so that they can update their browser.
Waiting for your reply.
Thanks

Answer 1

You can check the browser version by using the PHP User Agent
if($_SERVER['HTTP_USER_AGENT'] == 'Firefox (or whatever)'){
echo 'Please update your browser.';
}
A better way to do it would be by checking the version of their browser. To do this, first, use get_browser:
$users_browser = get_browser(null, true);
Then, do the same thing as above, but use the version element:
if($users_browser[version] == 1.0.4){
echo 'Please update your browser.';
}
This would take some time, and testing, on your part, to find which browsers ad versions work. Then, you could double-check:
if($_SERVER['HTTP_USER_AGENT'] == 'Firefox'){
if($users_browser[version] <= 0.9){
echo 'Please update your browser.';
}
}
This would display the error to anyone using Firefox version 0.9 or earlier.
I hope this helps.

Answer 2

As others have noted, using JS to check for the feature you need in the browser is best. But if you must do it on the server, your php could check the $_SERVER['HTTP_USER_AGENT'] string for details. For example:
Here is the request from my Mac:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_5) AppleWebKit/536.30.1 (KHTML, like Gecko) Version/6.0.5 Safari/536.30.1
And here from my Windows server:
Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0)