What are the potential pitfalls of relying on user agent strings to identify browsers in PHP?

Relying on user agent strings to identify browsers in PHP can be unreliable as they can be easily manipulated or spoofed by users. A more reliable approach is to use feature detection or browser capabilities detection instead of relying solely on user agent strings.

$browser = get_browser(null, true);
if($browser['browser'] == 'Chrome'){
    // Do something for Chrome browser
} elseif($browser['browser'] == 'Firefox'){
    // Do something for Firefox browser
} else {
    // Handle other browsers or unknown browsers
}