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Welcome to Geeklog Friday, March 06 2015 @ 12:32 PM EST
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// Hack to filter out user-generated CSS attributes
$str = preg_replace( '/style="[^"]+"/', '', $str );
Doh!... that actually only fixes it if the user writes nice clean HTML with no spaces before/after the = sign.
I'm thinking maybe phpfilter should be integrated instead, it still lets images from the main site get loaded (allowing you to disable a page with a 2000x2000 pixel repeating pattern of the site logo) but I've contacted the author about it.
Anyone have other suggestions?