note 58247 added to ref.math

I need a function that changes the amount of the numbers after the decimal point in a number. example: the code: $num=123.65784346454; $num=funcname($num,2); echo($num); would write in the screen 123.65. is this function exist? or should I write it? ---- Manual Page -- http://www.php.net/manual/en/ref.math.php Edit -- http://master.php.net/manage/user-notes.php?action=edit+58247 Delete: added to the manual -- http://master.php.net/manage/user-notes.php?action=delete+58247&report=yes&reason=added+to+the+manual Delete: bad code -- http://master.php.net/manage/user-notes.php?action=delete+58247&report=yes&reason=bad+code Delete: spam -- http://master.php.net/manage/user-notes.php?action=delete+58247&report=yes&reason=spam Delete: useless -- http://master.php.net/manage/user-notes.php?action=delete+58247&report=yes&reason=useless Delete: non-english -- http://master.php.net/manage/user-notes.php?action=delete+58247&report=yes&reason=non-english Delete: already in docs -- http://master.php.net/manage/user-notes.php?action=delete+58247&report=yes&reason=already+in+docs Delete: other reasons -- http://master.php.net/manage/user-notes.php?action=delete+58247&report=yes Reject -- http://master.php.net/manage/user-notes.php?action=reject+58247&report=yes Search -- http://master.php.net/manage/user-notes.php