Function to round bc string:
<?php
function bcround($strval, $precision = 0) {
if (false !== ($pos = strpos($strval, '.')) && (strlen($strval) - $pos - 1) > $precision) {
$zeros = str_repeat("0", $precision);
return bcadd($strval, "0.{$zeros}5", $precision);
} else {
return $strval;
}
}
?>