Rounding Mechanism to nearest 0.05

Question

I would like to solve rounding mechanism by using php4,5.2 and below (not 5.3) Currently I am doing 0.05 rounding, something like this page:

http://www.bnm.gov.my/in

Answer 1

use this function

function rndfunc($x){
  return round($x * 2, 1) / 2;
}

Answer 2

I'm sure there are more elegant solutions, but this appears to suit the task:

<?php

// setup test
$start_num = 89.90;
$iterations = 10;

// loop through test numbers
for ($i = 0; $i < $iterations; $i++) {
  nickleRound($start_num + (0.01 * $i));
  echo "\n\n";
}

//
function nickleRound($num) {
  $p = 0.05;
  echo "\n" . 'p= ' . $p;

  $num = round($num, 2);
  echo "\n" . 'num= ' . $num;

  $r = ($num / $p);
  echo "\n" . 'r= ' . $r;

  $r2 = ceil($r) - $r;  
  echo "\n" . 'r2= ' . $r2;

  $a = round($num, 1);
  if (($r2 > 0) && ($r2 < 0.5)) {
    $a = $a + 0.05; 
  }
  echo "\n" . 'a= ' . $a;
}

Answer 3

Hint:-

$input1 = 24.05;

$things = abs($input * 20 ); // 481 ".05"s

$tenpcnt = abs($things / 10); // 48 ".05"s

$ouput = $tenpcnt / 20;

echo $ouput; // 2.40

Answer 4

//Round to nearest 0.05
echo round ($number * 20, 0) / 20;

//Round Up to nearest 0.05
echo ceil ($number * 20) / 20;

//Round Down to nearest 0.05
echo floor ($number * 20) / 20;