Description:
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A note added at "http://www.php.net/manual/en/function.round.php" is inaccurate

limit0.com
17-Aug-2003 09:58 
Here is how to always round up...
$x = (a/b);
$r = round($x);
$d = ($x-$r);

if ($d>0){
$x = ($r+1);
}
.....


The result above will not always round up variable $x.
e.g If $x=0.6777
then $r = 1 and $d = -0.3223
Since $d < 0
$x is still 0.6777. It never round up ,except if $x < 0.5. 
I believe ceil() is doing a good job.