detect plain text or html

Question

In my application I am processing mail texts using PHP. For some mail clients such as sina.com is sending bad headers. For example, they are sending HTML mail but sending the header Content-Type as text/plain.

Now, for these mails, my application is considering the HTML as text. In PHP how can I detect if a text contain html text or not?

Answer 1

是的，您可以使用strip_tags()并将经过过滤的邮件正文与原始邮件进行比较，以查看是否存在差异，但是请不要忘记，在纯文本中，您可能会将HTML标签作为普通文本，并且我认为strip_tags()将删除这些标签。

Answer 2

preg_match('/\<html\>(.*)\<\/html\>/', $emailbody)

如果匹配，则为HTML。