Programming PHP

Name

round

Synopsis

double round(double number[, int precision])

Returns the integer value nearest to number at the precision number of decimal places. The default for precision is 0 (integer rounding). Note that this function provides proper rounding—odd whole numbers are rounded up on a .5, even whole numbers are rounded down on a .5. That is:

$first = round(1.5); // $first is 2
$second = round(2.5); // $second is also 2!

If you want the rounding taught to you in grade school, either add a small number (smaller than the precision you’re after), or, if you’re using whole numbers, add .5 and call floor( ) on the result.