(PHP 4 >= 4.0.7, PECL dbplus:0.9)
dbplus_update — Update specified tuple in relation
dbplus_update() replaces the old tuple with the data from the new one, only if the old completely matches a tuple within relation .
This function is EXPERIMENTAL. The behaviour of this function, its name, and surrounding documentation may change without notice in a future release of PHP. This function should be used at your own risk.