How to use round in number formate in php code example

Example 1: php round decimal

$value = 1.23456789;
$rounded_value = round($value, 2); 
// 2 is the precision here we will get 1.23

Example 2: php number format without rounding

function cutNum($num, $precision = 2) {
    return floor($num) . substr(str_replace(floor($num), '', $num), 0, $precision + 1);
}