note 59648 added to function.abs

I'm unable to replicate concordia's problem with the $n = $n - $n * 2 code. I agree with the simplification to $n *= -1. But there's no reason that concordia's code should return 6 for the value -2, and it doesn't appear to. When I tried it, PHP returned 2, as it should. If PHP were somehow flipping the sign of integers randomly, that would be a *major* bug! There doesn't seem to be a sgn() function yet. Here's some quick code to do it: function sgn($x) { return $x ? ($x>0 ? 1 : -1) : 0; } You could use $x ? abs($x)/$x : 0 too, but might as well avoid the float division. ---- Manual Page -- http://www.php.net/manual/en/function.abs.php Edit -- http://master.php.net/manage/user-notes.php?action=edit+59648 Delete: added to the manual -- http://master.php.net/manage/user-notes.php?action=delete+59648&report=yes&reason=added+to+the+manual Delete: bad code -- http://master.php.net/manage/user-notes.php?action=delete+59648&report=yes&reason=bad+code Delete: spam -- http://master.php.net/manage/user-notes.php?action=delete+59648&report=yes&reason=spam Delete: useless -- http://master.php.net/manage/user-notes.php?action=delete+59648&report=yes&reason=useless Delete: non-english -- http://master.php.net/manage/user-notes.php?action=delete+59648&report=yes&reason=non-english Delete: already in docs -- http://master.php.net/manage/user-notes.php?action=delete+59648&report=yes&reason=already+in+docs Delete: other reasons -- http://master.php.net/manage/user-notes.php?action=delete+59648&report=yes Reject -- http://master.php.net/manage/user-notes.php?action=reject+59648&report=yes Search -- http://master.php.net/manage/user-notes.php