forked from extern/egroupware
8f797be836
- can be used via html class like:
$clean_html = html::purify($html);
- using it now in eTemplate to remove malicious code from html:
a) when displaying "formatted text"
b) when "formatted text" get's input by the user
46 lines
1.7 KiB
Plaintext
Executable File
46 lines
1.7 KiB
Plaintext
Executable File
AutoFormat.RemoveEmpty
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TYPE: bool
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VERSION: 3.2.0
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DEFAULT: false
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--DESCRIPTION--
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<p>
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When enabled, HTML Purifier will attempt to remove empty elements that
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contribute no semantic information to the document. The following types
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of nodes will be removed:
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</p>
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<ul><li>
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Tags with no attributes and no content, and that are not empty
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elements (remove <code><a></a></code> but not
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<code><br /></code>), and
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</li>
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<li>
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Tags with no content, except for:<ul>
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<li>The <code>colgroup</code> element, or</li>
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<li>
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Elements with the <code>id</code> or <code>name</code> attribute,
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when those attributes are permitted on those elements.
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</li>
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</ul></li>
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</ul>
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<p>
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Please be very careful when using this functionality; while it may not
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seem that empty elements contain useful information, they can alter the
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layout of a document given appropriate styling. This directive is most
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useful when you are processing machine-generated HTML, please avoid using
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it on regular user HTML.
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</p>
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<p>
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Elements that contain only whitespace will be treated as empty. Non-breaking
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spaces, however, do not count as whitespace.
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</p>
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<p>
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This algorithm is not perfect; you may still notice some empty tags,
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particularly if a node had elements, but those elements were later removed
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because they were not permitted in that context, or tags that, after
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being auto-closed by another tag, where empty. This is for safety reasons
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to prevent clever code from breaking validation. The general rule of thumb:
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if a tag looked empty on the way end, it will get removed; if HTML Purifier
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made it empty, it will stay.
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</p>
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--# vim: et sw=4 sts=4
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