How can the browser be determined using PHP without relying on the getbrowser function?

The browser can be determined in PHP by checking the user agent string provided by the browser. This string contains information about the browser and can be used to identify it. One way to do this is by using regular expressions to match common browser user agent patterns. 

$user_agent = $_SERVER['HTTP_USER_AGENT'];

if (preg_match('/MSIE/i', $user_agent)) {
    $browser = 'Internet Explorer';
} elseif (preg_match('/Firefox/i', $user_agent)) {
    $browser = 'Mozilla Firefox';
} elseif (preg_match('/Chrome/i', $user_agent)) {
    $browser = 'Google Chrome';
} elseif (preg_match('/Safari/i', $user_agent)) {
    $browser = 'Apple Safari';
} elseif (preg_match('/Opera/i', $user_agent)) {
    $browser = 'Opera';
} else {
    $browser = 'Unknown';
}

echo "Browser: " . $browser;

Keywords

browser detection PHP user agent HTTP headers browser sniffing

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