number format without round up

gistfile1.txt

<?php 
function fix_number_format($num, $decimals = 2, $decimals_seperator = '.', $thousands_separator = ','){
    $num = floatval($num);
    $num = number_format( $num, ($decimals + 1), $decimals_seperator, $thousands_separator);
    $num = substr($num, 0, -1);
    return $num;
}