php cut decimal without rounding code example

Example 1: php 2 decimal places without rounding

<?php 
function cutAfterDot($number, $afterDot = 2){
$a = $number * pow(10, $afterDot);
$b = floor($a);
$c = pow(10, $afterDot);
echo "a $a, b $b, c $c<br/>";
return $b/$c ;
}
echo cutAfterDot(2.05,2);

/*
output =   a 205, b 204, c 100 
2.04
*/

?>

Example 2: php number format without rounding

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