How to get the browser details of a visitor in PHP?

The browser sends a text called user agent with every request. In PHP you can read it from $_SERVER["HTTP_USER_AGENT"].

<?php
echo $_SERVER["HTTP_USER_AGENT"];
?>

Output:

PHP also has the get_browser() function, which tells the browser name, version and platform in an array. But it needs a browscap.ini file configured in php.ini, which is not available on most servers.

• The user agent is sent by the browser, so a visitor can change or fake it.
• Do not use it for security. For features like JavaScript or cookies, test the feature in the browser instead of checking the browser name.

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