And if the numbers are from different subnets, you could sort like so
(assuming addresses are in a 1-dimensional array, here called
$IpAddresses):
function sort_address($IpAddresses) {
$List = array();
foreach ($IpAddresses as $A) {
list($x,$y,$z,$t) = explode('.', $A);
$List[($x*16777216) + ($y*6553616) + ($z*256) + $t] = $A;
}
ksort($List, SORT_NUMERIC);
return array_values($List);
}
My first thought was to use the line
$List[($x<<24) + ($y<<16) + ($z<<8) + $t] = $A;
instead, and gain a little speed advantage by bitshifting instead of
multiplying, but then you'd need to force $x, $y, $z and $t to
integers first. You might be able to do
$List[(((int)$x)<<24) + (((int)$y)<<16) + (((int)$z)<<8) + $t] = $A;
or
$List[(($x+0)<<24) + (($y+0)<<16) + (($z+0)<<8) + $t] = $A;
****************************************************************************
I MADE A BIT OF A CUT'N'PASTE ERROR IN THE LINE ABOVE IN MY PREVIOUS EMAIL!
****************************************************************************
instead, though. If you wanted 'em in REVERSE order, use krsort()
instead of ksort().
Usual 'untested code' warnings apply.
- steve
--
+------------------------ Open source questions? ------------------------+
| Steve Edberg University of California, Davis |
| [EMAIL PROTECTED] Computer Consultant |
| http://aesric.ucdavis.edu/ http://pgfsun.ucdavis.edu/ |
+----------- http://pgfsun.ucdavis.edu/open-source-tools.html -----------+
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