Description
int
mysql_affected_rows ( [resource link_identifier])
mysql_affected_rows() returns the number
of rows affected by the last INSERT, UPDATE or DELETE query
associated with link_identifier. If the
link identifier isn't specified, the last link opened by
mysql_connect() is assumed.
Note:
If you are using transactions, you need to call
mysql_affected_rows() after your INSERT,
UPDATE, or DELETE query, not after the commit.
If the last query was a DELETE query with no WHERE clause, all
of the records will have been deleted from the table but this
function will return zero.
Note:
When using UPDATE, MySQL will not update columns where the new
value is the same as the old value. This creates the possiblity
that mysql_affected_rows() may not actually
equal the number of rows matched, only the number of rows that
were literally affected by the query.
mysql_affected_rows() does not work with
SELECT statements; only on statements which modify records. To
retrieve the number of rows returned by a SELECT, use
mysql_num_rows().
If the last query failed, this function will return -1.
See also: mysql_num_rows().
