var $input = 12345.55
var $precision=1
var $output = call round $num=$input; $precision=
$precision
print input = $input
print output = $output
var $input = 12345.55
var $precision=-3
var $output = call round $num=$input; $precision=
$precision
print input = $input
print output = $output
var $input = 12345.55
var $precision=1
var $mode=PHP_ROUND_HALF_DOWN
var $output = call round $num=$input; $mode=$
mode; $precision=$precision
print input = $input
print output = $output