php 页面来源

<?php
// 获取引用页面（Referrer）
$referrer = $_SERVER['HTTP_REFERER'] ?? '无引用页面';

// 获取用户代理（User-Agent）
$user_agent = $_SERVER['HTTP_USER_AGENT'] ?? '无用户代理';

echo "引用页面: " . htmlspecialchars($referrer) . "<br>";
echo "用户代理: " . htmlspecialchars($user_agent);
?>

<?php
// 解析 User-Agent 获取浏览器信息
function get_browser_info($user_agent) {
    $browsers = array(
        'Firefox' => '/Firefox[\/\s]([\d\.]+)[\s\S]+?Gecko\/\d+/',
        'Chrome' => '/Chrome\/([\d\.]+)/',
        'Safari' => '/Version\/([\d\.]+).*Safari/',
        'Opera' => '/Opera[\/\s]([\d\.]+)/',
        'IE' => '/MSIE\s([\d\.]+)|Trident\/[\d\.]+;.*rv:([\d\.]+)/'
    );

    foreach ($browsers as $browser => $pattern) {
        if (preg_match($pattern, $user_agent, $matches)) {
            return $browser . ' ' . $matches[1];
        }
    }
    return 'Unknown';
}

$user_agent = $_SERVER['HTTP_USER_AGENT'] ?? '无用户代理';
$browser_info = get_browser_info($user_agent);
echo "浏览器信息: " . htmlspecialchars($browser_info);
?>