1URI.SafeIframeRegexp
2TYPE: string/null
3VERSION: 4.4.0
4DEFAULT: NULL
5--DESCRIPTION--
6<p>
7    A PCRE regular expression that will be matched against an iframe URI.  This is
8    a relatively inflexible scheme, but works well enough for the most common
9    use-case of iframes: embedded video.  This directive only has an effect if
10    %HTML.SafeIframe is enabled.  Here are some example values:
11</p>
12<ul>
13    <li><code>%^http://www.youtube.com/embed/%</code> - Allow YouTube videos</li>
14    <li><code>%^http://player.vimeo.com/video/%</code> - Allow Vimeo videos</li>
15    <li><code>%^http://(www.youtube.com/embed/|player.vimeo.com/video/)%</code> - Allow both</li>
16</ul>
17<p>
18    Note that this directive does not give you enough granularity to, say, disable
19    all <code>autoplay</code> videos.  Pipe up on the HTML Purifier forums if this
20    is a capability you want.
21</p>
22--# vim: et sw=4 sts=4
23