Featch ID number from Datsbase

[amber.long83]

Hello Everyone!

I have made one registration system that can send an email with registered data to the administrator and to the user.

now my problem is that how can i know the ID number of the new user registred in my database, that have auto increase function, and display it in the email that the system will send?

$checkid = mysql_query("SELECT id FROM form1 WHERE id='$id'");

$message2 = "Your ID: $id"

any one can please help me to solve this problem

Thanks in advance.