>  If you are just commenting on the fact that something is not
 >  documented, save your breath. This is where you add to the
 >  documentation, not where you ask us to add the documentation. You may
 >  choose to email the PHP Documentation Team to discuss the change.

So here we go:
The function die() expects a string as parameter. Other functions that 
expect a string, but are provided with a integer, will cast that int to 
string. die() doesn't output anything and terminates the php script.

I could verify this on two machines:

Intel Celeron running SuSE Linux 8.2,
Kernel 2.4.20-4GB as provided by SuSE
Apache/1.3.27 as provided by SuSE
PHP/4.3.1 as provided by SuSE

and

Intel Pentium M (Centrino) running SuSE Linux 9.0
jailed in a VMWARE box on Windows XP ;-)
Kernel 2.4.21-99-default as provided by SuSE
Apache/1.3.28 as provided by SuSE
PHP/5.0.0b3 compiled with gcc version 3.3.1

Futher information provided on request.

Hope you can add this to the docs, because it took me quite a minute to 
figure out this behavior.

Regards,

      Oliver