Concerned about XSS (cross-site scripting)? This looks like it might be a useful little PHP HTML scrubber to santitize inputs. Written by some Russian coders, cool.

According to Freshmeat, it’s BSD licensed.

safehtml@pixelapes: — Pixel-Apes

SafeHTML v.1.2.0

SafeHTML is anti-XSS HTML parser, written in PHP.

Table of contents:
About this project
Authors and copyrights
Contacts

About this project

This parser strips down all potentially dangerous content within HTML:

• opening tag without its closing tag 
• closing tag without its opening tag 
• any of these tags: “base”, “basefont”, “head”, “html”, “body”, “applet”, “object”,
  “iframe”, “frame”, “frameset”, “script”, “layer”, “ilayer”, “embed”, “bgsound”,
  “link”, “meta”, “style”, “title”, “blink”, “xml” etc.
• any of these attributes: on*, data*, dynsrc
• javascript:/vbscript:/about: etc. protocols
  
• /behavior etc. in styles
• any other active content

It also tries to convert code to XHTML valid, but htmltidy is far better solution for this task.