Watch: what happened, in about a minute

Older figures in this video. It was made before our 22 October correction and shows the original count of 19,644 PHP sites, which included some sites twice. The corrected census count is 19,122 unique sites, and the 91% headline is unchanged after rounding. The video also treats an older version number as unpatched. Many of those sites may have a backported fix from their host. See the correction