URI.SafeIframeRegexp
TYPE: string/null
VERSION: 4.4.0
DEFAULT: NULL
--DESCRIPTION--
<p>
A PCRE regular expression that will be matched against an iframe URI. This is
a relatively inflexible scheme, but works well enough for the most common
use-case of iframes: embedded video. This directive only has an effect if
%HTML.SafeIframe is enabled. Here are some example values:
</p>
<ul>
<li><code>%^http://www.youtube.com/embed/%</code> - Allow YouTube videos</li>
<li><code>%^http://player.vimeo.com/video/%</code> - Allow Vimeo videos</li>
<li><code>%^http://(www.youtube.com/embed/|player.vimeo.com/video/)%</code> - Allow both</li>
</ul>
<p>
Note that this directive does not give you enough granularity to, say, disable
all <code>autoplay</code> videos. Pipe up on the HTML Purifier forums if this
is a capability you want.
</p>
--# vim: et sw=4 sts=4
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