Windows 桌面快捷方式本質是 .url 文本文件，格式為 INI 風格。PHP 動態生成並以 application/octet-stream 下發，瀏覽器彈出「保存為」對話框，用戶保存到桌面即可一鍵訪問。
<?php
// 配置
$siteUrl = 'https://www.example.com/';
$shortcutName = '我的網站'; // 保存的文件名 (不含 .url)
// 構建 .url 內容
$content = <<<a href="shortcut.php" class="btn btn-primary">
<i class="bi bi-desktop"></i> 發送到桌面
</a><?php
// current_page_shortcut.php
$protocol = (!empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] !== 'off') ? 'https' : 'http';
$currentUrl = "{$protocol}://{$_SERVER['HTTP_HOST']}{$_SERVER['REQUEST_URI']}";
$pageTitle = '當前頁面'; // 可從 獲取或傳參
$content = "[InternetShortcut]\nURL={$currentUrl}\nIDList=\n[{000214A0-0000-0000-C000-000000000046}]\nProp3=19,2\n";
header('Content-Type: application/octet-stream');
header('Content-Disposition: attachment; filename="' . rawurlencode($pageTitle) . '.url"');
echo $content;
?></code></pre>
<h2>圖標設置 (Favicon)</h2>
<ol>
<li>在網站根目錄放置 <code>favicon.ico</code> (16x16, 32x32, 48x48 多尺寸)</li>
<li>HTML 中聲明：<code><link rel="icon" href="/favicon.ico"></code></li>
<li>Windows 會自動從網站獲取 Favicon 作為快捷方式圖標</li>
<li>若需強制指定圖標 URL，可在 .url 中添加：<code>IconFile=https://example.com/favicon.ico</code><br><code>IconIndex=0</code></li>
</ol>
<h2>跨平台兼容性說明</h2>
<table border="1" cellpadding="5" cellspacing="0" style="border-collapse: collapse; width: 100%;">
<thead><tr style="background:#f0f0f0;"><th>平台</th><th>支持 .url</th><th>替代方案</th></tr></thead>
<tbody>
<tr><td>Windows</td><td>✅ 原生支持</td><td>—</td></tr>
<tr><td>macOS</td><td>❌</td><td>生成 <code>.webloc</code> (XML 格式) 或引導用戶拖拽網址到 Dock</td></tr>
<tr><td>Linux (GNOME/KDE)</td><td>❌</td><td>生成 <code>.desktop</code> 文件 (<code>Type=Link</code>, <code>URL=...</code>)</td></tr>
<tr><td>移動端</td><td>❌</td><td>引導「添加到主屏幕」(PWA Manifest) 或分享→添加到主屏幕</td></tr>
</tbody>
</table>
<h2>完整跨平台生成器 (示例)</h2>
<pre><code><?php
function generateShortcut(string $url, string $title): array {
$win = "[InternetShortcut]\nURL={$url}\nIconFile={$url}favicon.ico\nIconIndex=0\n";
$mac = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<!DOCTYPE plist PUBLIC \"-//Apple//DTD PLIST 1.0//EN\" \"https://www.apple.com/DTDs/PropertyList-1.0.dtd\">\n<plist version=\"1.0\">\n<dict>\n<key>URL</key><string>{$url}</string>\n</dict>\n</plist>";
$linux = "[Desktop Entry]\nType=Link\nURL={$url}\nName={$title}\nIcon={$url}favicon.ico\n";
return [
'windows' => ['content'=>$win, 'ext'=>'url', 'mime'=>'application/octet-stream'],
'macos' => ['content'=>$mac, 'ext'=>'webloc', 'mime'=>'application/x-plist'],
'linux' => ['content'=>$linux, 'ext'=>'desktop', 'mime'=>'application/x-desktop'],
];
}
// 使用
$shortcuts = generateShortcut('https://example.com/', 'Example Site');
// 前端提供下載鏈接或按鈕
?></code></pre>
<h2>安全提示</h2>
<ul>
<li>僅在受信任頁面提供下載，防止釣魚網站偽裝生成惡意快捷方式</li>
<li>驗證 Referer 或 CSRF Token，防止 CSRF 攻擊誘導用戶下載</li>
<li>文件名使用 <code>rawurlencode()</code> 編碼，防止中文亂碼或注入</li>
</ul>
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