Mathjax backslash problem

[Jinroh]

Hi,

I would like to integrate Mathjax
(http://www.mathjax.org/). This is quite simple
(i did it on many websites) but phpmyChat removes all the back slash from
Latex commands like:

\

Do you have a solution and can you integrate and special prefix that allows
the use of Mathjax.

Thanks for your answer

[Ciprian Murariu]

I'm really confused about this.

So to understand: you want to post messages containing commands that will be
used by others with copy&paste to get the right formulas using mathjax? And
the only issue is the removal of backslashes?

As far as I remember, backslashes are removed for a good reason (not sure now,
but I guess it's a security related thing).

Which version of phpMyChat you're trying to patch? Standard or Plus?

I'll take a look to see where and why the removal happens. Meantime, answer my
questions.

Ciprian M.

[Ciprian Murariu]

After a few tests, I found this:

Files: loader.php and messagesL.php

Comment out this line:

$Message = stripslashes($Message);

Files: input.php and handle_inputH.php

Search for this stripslashes($M) and replace with $M

Please be aware that this could lead to some other errors, so if you keep
getting frozen windows after posting... this could be a reason.

Let me know how this is going for you.

I'm still waiting to know of your version.

Ciprian M.

[Jinroh]

Thanks for your quick answer.

The stripslash is effectively for security reason (if i remember it's against
SQL Injection).

Your proposition works now. I still not render in Latex but i will found why.
It but be a minor problem i think.

Thanks for your help.

[Ciprian Murariu]

I'm glad it helped somehow. Let us know your final solution to implement this
plugin.

Ciprian M.

[Ciprian Murariu]

I just tested the Latex and it works. After the patches I described above, you
need to add this line in both loader.php and messagesL.php

<script type="text/javascript" src="[http://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS- MML_HTMLorMML](http://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX- AMS-MML_HTMLorMML)"></script>

... right before the tag </HEAD> (after the <LINK REL="..."> line)

Give me your chat url so I can check together.

Ciprian M.

[Jinroh]

I made the changes you indicated (it was difficult to guess...)

http://www.sciences.ch/htmlfr/php/chat/index.php

On Google Chrome 16.0.912.63 and Opera 11.6.1185 only Latex command like: $$
x^2 $$ works. When i use Latex commands with back slash like \ or
$$f(x)=\mathop{\int}{-\infty}^x~e^{-t^2}dt$$ he doubles all the slashes.

On Firefox 9.0.1 and Internet Explorer 9.0.8112 .16421 nothing works.

[Ciprian Murariu]

Hmm, that's why I needed to know your chat version, to test and suggest the
right patches.

I've read a bit mathjax forums and they said IE9 it's incompatible, it must be
run in IE7 compatibility mode or something.

I confess, I only tested with Chrome. Let's go deeper now.

I'm in your chat and I'll let you other contact data.

ciprian M.

[Ciprian Murariu]

Can you check your both emails please?

Ciprian