How to determine the legality of editing HTML online_html/css_WEB-ITnose

HTML tag editor filter

There is a corporate website, users can publish articles through the background,
and users can edit the HTML tags of the article content through the online editor.
Now the question arises, how to ensure that all HTML tags in the HTML code submitted by users through the online editor are completely avoided?

Because it is currently discovered that when articles containing HTML code are read from the database,
Because in the previous HTML code in the database, some HTML tags did not have closing tags (for example, there The beginning

does not have

),
The final result is that the article read like this will destroy the layout and style of my existing page.
How do you solve this situation? ?

It is impossible to completely filter HTML because users require that the editing style functionality be retained, but how to ensure the legality of HTML tags submitted by users?


========================================== A little bit Sorry for the chaos======================================

Reply to the discussion (solution)

A. Use IFRAME as a self-closed container to display user articles. It will look like it when he edits it, and it will not affect your layout.
B. After receiving the submitted editing content, use the processing function to check the closure (relatively not difficult, because most of them are first-in, last-out nested structures, and a few single tags or compound tags are also regular), but it must Faced with a choice: return an error or autocorrect?

In terms of difficulty, it is recommended to use Plan A.

1. Do users want to retain the HTML code editing function? Most users do not understand HTML, and are even less familiar with DIV layout;
2. General website editors have "text mode" (default) and "code mode", and user input is directly in [text mode]. There is no need to involve HTML closure. .
3. If you want to bother, write a regular expression to check (match) the legality of HTML

1. Do users want to retain the HTML code editing function? Most users do not understand HTML, and are even less familiar with DIV layout;
2. General website editors have "text mode" (default) and "code mode", and user input is directly in [text mode]. There is no need to involve HTML closure. .
3. If you want to bother, write a regex to check (match) the legality of HTML

I am worried that some users will directly post the code in Word to my WEB online editor In the browser, when I read it, some of the code in the paste will destroy my original HTML style.