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23 March 2011 at 12:09am Last edited: 23 March 2011 12:48am
I have a form with multiple textarea fields, for some of which I use HTMLText type. I provide the users with a very stripped down version of TinyMCE for those. (buttons for bold, italic, setting links only)
The data in the forms is displayed on another page. So I guess there are two issues here, how to store it in the database, and how to display what is stored in the database.
I think I would probably be happy for people to write any kind of HTML, as long as everything in script tags will be removed. So that would actually be more like a blacklist really. I am wondering how best to achieve that.
Has anybody come across this problem, or got an idea how best to approach this? Are there any in-built methods in Silverstripe for this? Or would it be enough to just write some code to remove <script>..</script> from input of those fields? : Of course it is more complicated than that as I have just seen http://stackoverflow.com/questions/2698079/strip-script-tags-and-everything-in-between-with-php But do i really need to use HTMLPurifier?
24 March 2011 at 5:02am
I don't think you'd need more than a regular expression....
I often don't use regex if I don't understand them and in this case I'd probably use one of the functions on http://php.net/manual/en/function.strip-tags.php that the google search yeilded, there is quite often alot of gold in the comments of the php doc pages...
24 March 2011 at 6:00am Last edited: 24 March 2011 6:01am
Thanks for this, Barry
I did in the end implement HTMLpurifier though. I found that Andrew Short had used it in the rssconnector module, so that gave me an idea how to implement it. I put the HTMLPurifier code in a thirdparty directory under mysite/ , then created a class with a function in which config an purifier objects get created. This I can then call whenever I have some input that I would like to be purified.
It seems to work quite well. It might be a bit heavy, but I really like the idea that only specific tags are left through, rather than stripping out certain tags.
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