note 116510 added to book.bc

Note that when you use implementation of factorial that ClaudiuS made, you get results even if you try to calculate factorial of number that you normally can't, e.g. 2.5, -2, etc. Here is safer implementation: <?php /** * Calculates a factorial of given number. * @param string|int $num * @throws InvalidArgumentException * @return string */ function bcfact($num) { if (!filter_var($num, FILTER_VALIDATE_INT) || $num <= 0) { throw new InvalidArgumentException(sprintf('Argument must be natural number, "%s" given.', $num)); } for ($result = '1'; $num > 0; $num--) { $result = bcmul($result, $num); } return $result; } ?> ---- Server IP: 72.52.91.14 Probable Submitter: 213.192.60.53 ---- Manual Page -- http://php.net/manual/en/book.bc.php Edit -- https://master.php.net/note/edit/116510 Del: integrated -- https://master.php.net/note/delete/116510/integrated Del: useless -- https://master.php.net/note/delete/116510/useless Del: bad code -- https://master.php.net/note/delete/116510/bad+code Del: spam -- https://master.php.net/note/delete/116510/spam Del: non-english -- https://master.php.net/note/delete/116510/non-english Del: in docs -- https://master.php.net/note/delete/116510/in+docs Del: other reasons-- https://master.php.net/note/delete/116510 Reject -- https://master.php.net/note/reject/116510 Search -- https://master.php.net/manage/user-notes.php