note 58653 added to function.abs

concordia, you seem to be overcomplicating matters. If you want to do the reverse of the abs function, the only code required is: <?php function n_abs($num) { return ($num > 0) ? $num * -1 : $num; } n_abs(2); //-2 n_abs(-2); //-2 ?> If you want to switch the sign bit of a number, as your example seems to indicate... turn_neg (2); // -2 turn_neg (-2); // 2 ...you just need to do $num *= -1; Your function also doesn't seem to work. Switching "if (is_neg ($num))" to "if (!is_neg ($num))" would make it function as indicated by your comments (i.e. toggle the sign bit), but it would still be overly complicated. ---- Manual Page -- http://www.php.net/manual/en/function.abs.php Edit -- http://master.php.net/manage/user-notes.php?action=edit+58653 Delete: added to the manual -- http://master.php.net/manage/user-notes.php?action=delete+58653&report=yes&reason=added+to+the+manual Delete: bad code -- http://master.php.net/manage/user-notes.php?action=delete+58653&report=yes&reason=bad+code Delete: spam -- http://master.php.net/manage/user-notes.php?action=delete+58653&report=yes&reason=spam Delete: useless -- http://master.php.net/manage/user-notes.php?action=delete+58653&report=yes&reason=useless Delete: non-english -- http://master.php.net/manage/user-notes.php?action=delete+58653&report=yes&reason=non-english Delete: already in docs -- http://master.php.net/manage/user-notes.php?action=delete+58653&report=yes&reason=already+in+docs Delete: other reasons -- http://master.php.net/manage/user-notes.php?action=delete+58653&report=yes Reject -- http://master.php.net/manage/user-notes.php?action=reject+58653&report=yes Search -- http://master.php.net/manage/user-notes.php