mysql_insert_id — Returns the auto generated id used in the last query
my_ulonglong mysql_insert_id(MYSQL * mysql);The mysql_insert_id() function returns the ID generated by a query on a table with a column having the AUTO_INCREMENT attribute. If the last query wasn't an INSERT or UPDATE statement or if the modified table does not have a column with the AUTO_INCREMENT attribute, this function will return zero.
mysqlA mysql handle, which was previously allocated by mysql_init() or mysql_real_connect().
The value of the AUTO_INCREMENT field that was updated by the previous query. Returns zero if there was no previous query on the connection or if the query did not update an AUTO_INCREMENT value.