Re: PHP Cost/Benfit Analysis?

I don't have data either, but check out 
http://www.zend.com/solutions/why-php.php for some good arguments for PHP.

It strikes me that business types will feel more comfortable paying a 
company rather than relying on a community.  Primarily because it grants 
a single point of responsibility for any support issues that may arise.

That being the case check out 
http://www.zend.com/store/products/zend-platform/ for information on a 
product that has all the buzzwords that get business types all excited.

For the record, I do not work for Zend. :)  No, I swear I really don't!

I'm actually quite impressed by Zend's efforts to drive PHP into the 
'enterprise'.  Zend Platform delivers what it promises on ALL points; 
I'm finding this out during my eval of Zend Platform and Zend Studio 4.

You can pick errors from individual servers; whether the user complained 
or not.  Click on debug and it recreates the end users environment 
variables so you can reproduce the error.  At the same time starts a 
debug session within Zend Studio so you can step through the source code 
line by line.  And the debug session is still tied to your browser so 
you can continue to navigate your web application.  While still 
directing your debugging in Zend Studio.