How to check if the HTML code is valid via PHP or Javascript

Question

I am providing my users to create their own widgets on their profile pages.Widgets are created by HTML codes by user input.

But Sometimes, if user enter an invalid html code, widget field is corrupting. To avoid this situation, I must be sure the html code that user entered is valid.

My question is how to check a html code validation via PHP or Javascript.

Thanks in advance.

possible duplicate of HTML Validator in Javascript/PHP? ( not necessarily XML ) — Widor
– Widor, Commented May 16, 2012 at 10:50

0x3h · Accepted Answer · 2016-04-09 18:45:50Z

3

You can use the tidy php extension;

There are a number of things that you can do with it, but for your case I think you could just use the repairString method to get the clean version of the user input and compare it with the initial version,

Something like this:

$tidy = new tidy();
$clean = $tidy->repairString($user_input);

If no changes were made during the repairString method; $user_input and $clean should be the same.

edited Apr 9, 2016 at 18:45

0x3h

4629 silver badges23 bronze badges

answered May 16, 2012 at 10:51

mishu

5,3971 gold badge23 silver badges41 bronze badges

Sign up to request clarification or add additional context in comments.

5 Comments

Quentin Over a year ago

I've always found tidy to be really unreliable. Last time I tried to use it, it insisted on making changes to my (valid) markup that I really didn't want. I ended up having to perform a find and replace, then run tidy, then run find and replace again to work around the problem.

mishu Over a year ago

@Quentin and that did not depend on the doctype?

Quentin Over a year ago

No, the Doctype was immaterial.

mishu Over a year ago

@Quentin in this case thanks for sharing; this might be very useful in the future

Tuğrul Mete Over a year ago

Thanks for your answer. Tidy just worked well. I'm now repairing all user inputs with tidy and then save them.

Community · Accepted Answer · 2023-11-17 19:32:19Z

0

Take a look at this SO question / answers. The DOMDocument-Class may validate your HTML with PHP.

edited Nov 17, 2023 at 19:32

CommunityBot

11 silver badge

answered May 16, 2012 at 10:53

Michael Seibt

1,3469 silver badges13 bronze badges

Collectives™ on Stack Overflow

How to check if the HTML code is valid via PHP or Javascript

2 Answers 2

5 Comments

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

5 Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related