Htmlpurifier Why is this kind of library so big?

Htmlpurifier Why does this class library have such a large capacity?
RT, I wrote a station, their own rich text editor, Rich text filter really do not want to write their own, the Internet to find this class library, the result was 1.03MB capacity scare, I 3 stations are not so big
The standard version has 354 files, should not be used in all it?
What files will be used in particular?
Is there any other useful Rich Text filter library?
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Because more features are available. If you don't need to use so much.
You can try this kind of http://blog.csdn.net/fdipzone/article/details/11884285.
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Don't know why to filter
1, if you allow users to submit some code (such as here) but just to show, then filtered out no no no?
2. If you allow the user to submit executable code, then what is the basis for determining which part is harmful? Is it possible to filter out and execute?

If you allow only limited markup to be submitted for control of the format, then the Strip_tags function will already meet your requirements.

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