Round Off Decimal

Round a number up or down or Round off a floating decimal point number using PHP's functions round().

Example. round();

echo round(3.4); // 3
echo round(3.5); // 4
echo round(3.6); // 4
echo round(3.6, 0); // 4
echo round(1.95583, 2); // 1.96
echo round(1241757, -3); // 1242000
echo round(5.045, 2); // 5.05
echo round(5.055, 2); // 5.06
?>

Convert to Decimal Point

Example. number_format();

$number = "28";
$number = number_format($number, 2);
echo $number; // equals "28.00"
?>

For a good book on PHP, check out Beginning PHP4