Just reposting this bug that was emailed to me from Zend.

 

http://bugs.php.net/bug.php?id=53632

 

Test script:
---------------
<?php $d = 2.2250738585072011e-308; ?>

Expected result:
----------------
No Hang.

Actual result:
--------------
Hang.

 

I'd urge you all to test your server and see if its affected. This could make your site vulnerable to DDoS attacks if someone was to put it in a query string, post var, etc.

Bump for people who may have missed, great post.

Saw this on reddit first, the script may loop but does not stop any other server actions from being performed.