What potential issues can arise when trying to identify the user's browser using $_SERVER['HTTP_USER_AGENT']?

One potential issue is that the user agent string provided by $_SERVER['HTTP_USER_AGENT'] can be easily manipulated or spoofed by users, leading to inaccurate browser identification. To mitigate this issue, you can use a more reliable method such as using a library or service that accurately detects the user's browser based on multiple factors. 

// Example of using a library like browscap to accurately detect the user's browser
$browser = get_browser(null, true);
echo $browser['browser'];

Keywords

$_SERVER HTTP_USER_AGENT browser identification user agent string compatibility issues

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