A critical PHP vulnerability may take websites down today

- PHP: 6 events in the last 90 days
- Previous: earlier the same day · 'We expect mass attacks to start within 15 minutes of the release': Web admins braced for emergency PHP updates to plug leaked high-severity holes
What happened
A patch is about to roll out, but the exploit affects more than 40 percent of the internet.
Summary assembled by rule from the sources below