Posted by Chris Boget on 04/29/05 16:20

Thank you for everyone's suggestions. Using them
(and a few other things I've found elsewhere), I've
come up with the following function:

function roundToNearest( $number, $toNearest = 5 ) {

$retval = 0;

$mod = $number % $toNearest;

if( $mod >= 0 ) {
$retval = ( $mod > ( $toNearest / 2 )) ? $number + ( $toNearest - $mod )
: $number - $mod;

} else {
$retval = ( $mod > ( -$toNearest / 2 )) ? $number - $mod : $number +
( -$toNearest - $mod );

}
return $retval;

} // end function round();

that works with positive and negative numbers and seems
to work with every test I threw at it.

Thanks again for everyone's help!

thnx,
Chris

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