What are the potential pitfalls of using get_browser() to determine the user's browser in PHP?

The potential pitfalls of using get_browser() in PHP include the need for the browscap.ini file to be properly configured and up-to-date, which can be cumbersome to manage. Additionally, this function may not always return accurate results, especially with modern browsers that have varied user agent strings. To address this issue, a more reliable approach is to use the $_SERVER['HTTP_USER_AGENT'] variable to extract and identify the user's browser.

$user_agent = $_SERVER['HTTP_USER_AGENT'];

if (strpos($user_agent, 'Firefox') !== false) {
    echo "User is using Firefox";
} elseif (strpos($user_agent, 'Chrome') !== false) {
    echo "User is using Chrome";
} elseif (strpos($user_agent, 'Safari') !== false) {
    echo "User is using Safari";
} else {
    echo "User browser is not recognized";
}