note 102641 modified in function.round by danbrown

Round function with PHP_ROUND_HALF_UP conversion

<?php
function round_up ( $value, $precision ) {

	$pow = pow ( 10, $precision );

	return ( ceil ( $pow * $value ) + ceil ( $pow * $value - ceil ( $pow * $value ) ) ) / $pow;

}

var_dump ( round_up ( 499.9440000046, 3 ) ); // float(499.945)
?>

--was--
Round function with PHP_ROUND_HALF_UP conversion

function round_up ( $value, $precision ) {

	$pow = pow ( 10, $precision );

	return ( ceil ( $pow * $value ) + ceil ( $pow * $value - ceil ( $pow * $value ) ) ) / $pow;

}

var_dump ( round_up ( 499.9440000046, 3 ) ); // float(499.945)

http://php.net/manual/en/function.round.php