php 如何在 Gmail 中显示 <iframe> 标签
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How to display <iframe> tag to gmail
提问by user2247326
I use codeigniter to send email... After activating the user account it sends another email to insert tag but when the user receives the message, no tag appeared but when I tried using other elements like or it renders the style but how come doesn't?
我使用 codeigniter 发送电子邮件......激活用户帐户后，它会发送另一封电子邮件以插入标签，但是当用户收到消息时，没有标签出现，但是当我尝试使用其他元素时，或者它呈现样式，但为什么没有吨？
$message = 'Congratulations! Use the script below to add your widget.<br>';
$message .= "<iframe frameborder=\"0\" src=\"<?=base_url() ?>business/widget/{$id}\" height=\"320px;\" width=\"480px\" style=\"border: 1px solid #ccc;\"></iframe>";
$this->email->message($message);
if($this->email->send())
{
other code....
}
回答by Jared
Gmail and many other email clients are very strict about what HTML you can use in your HTML emails.
Gmail 和许多其他电子邮件客户端对可以在 HTML 电子邮件中使用的 HTML 非常严格。
<iframe>is strictly off limits, because it could expose the user to a website which they were not expecting, and the website at the other end could record info about the user (such as their IP address). Images are blocked for similar reasons.
<iframe>是严格禁止的，因为它可能会将用户暴露在他们意想不到的网站上，而另一端的网站可能会记录有关用户的信息（例如他们的 IP 地址）。图像因类似原因被屏蔽。
If I were you, I'd stick to using super basic HTML and CSS. Focus on getting the message to the user and hope their client makes the message look pretty. Always offer a link to view the full message elsewhere.
如果我是你，我会坚持使用超级基本的 HTML 和 CSS。专注于将消息传达给用户，并希望他们的客户使消息看起来很漂亮。始终提供链接以在别处查看完整消息。
回答by eggy
<iframe>s cannot be used in most email clients – whether in an application or as a website. They are either stripped for one of several reasons:
<iframe>s 不能在大多数电子邮件客户端中使用——无论是在应用程序中还是作为网站。它们要么由于以下几个原因之一被剥离：
- The mail/web client could have trouble rendering it, so it is excluded.
- An
<iframe>could be used for phishing/malicious attacks, putting malicious code in what was otherwise vetted and safe (the browser/client can't see or scan what gets loaded into an iframe, it just loads it into the DOM).
- 邮件/Web 客户端可能无法呈现它，因此将其排除在外。
- An
<iframe>可用于网络钓鱼/恶意攻击，将恶意代码放入经过和安全的内容中（浏览器/客户端无法看到或扫描加载到 iframe 中的内容，它只是将其加载到 DOM 中）。
An alternative, (what YouTube do), is instead of embedding something in an iframe (in their case, a video), they have an <a>wrapped around an <img>or thumbnail, which gives the impression that you are playing a video. All it does when you click on it, is it take you to that video's URL.
另一种选择（YouTube 所做的）不是在 iframe 中嵌入某些内容（在他们的情况下，是视频），而是有一个<a>环绕的<img>或 缩略图，给人一种您正在播放视频的印象。当您单击它时，它所做的一切就是将您带到该视频的 URL。
If you were trying to put extensive code into the email, you could manually write it in. This however has other effects, as some other tags are limited/styling can be a big hassle for emails. AFAIK some HTML5 elements are also stripped from emails.
如果您试图将大量代码放入电子邮件中，您可以手动将其写入。然而，这还有其他影响，因为其他一些标签是有限的/样式对电子邮件来说可能是一个大麻烦。AFAIK 一些 HTML5 元素也从电子邮件中删除。
As Orangepillsaid, Campaign Monitor have done the legwork and provided a chart showing where iframes can be used. They also suggest to stay away from iframes.
正如Orangepill所说，Campaign Monitor 已经完成了大量工作，并提供了一个图表，显示了可以在何处使用 iframe。他们还建议远离 iframe。
A solution not mentioned would be to have an image, with a link at the bottom that says View this message in a webpagewhich will take the user to a page with the <iframe>working.
一个没有提到的解决方案是有一个图像，底部有一个链接，上面写着在网页中查看此消息，它将把用户带到一个<iframe>工作页面。
