How to know which row was affected with a querry ???

[Zbigniew Szczesny]

Hello !

I have a following problem while scripting MySQL with PHP4:

Imagine the user may add a record to a table. How can I know precisely what was the 
number (auto increment primary key) given by MySQL to this new inserted row ??? You 
may presume there are many simultaneus users adding rows, so I need a accurate 
information.

Thank you for your kind help,
Ziggi