Question

I have the following piece of code for a very simple PHP polling script

<h2>Result:</h2>
<table>
  <tr>
    <td>Yes:</td>
    <td><img src="poll.gif"
width='<?php echo(100*round($yes/($no+$yes+$maybe),3)); ?>'
height='20'> <?php echo(100*round($yes/($no+$yes+$maybe),3)); ?>% </td>
  </tr>
  <tr>
    <td>No:</td>
    <td><img src="poll.gif"
width='<?php echo(100*round($no/($no+$yes+$maybe),3)); ?>'
height='20'> <?php echo(100*round($no/($no+$yes+$maybe),3)); ?>% </td>
  </tr>
  <tr>
    <td>Maybe:</td>
    <td><img src="poll.gif"
width='<?php echo(100*round($maybe/($no+$yes+$maybe),3)); ?>'
height='20'> <?php echo(100*round($maybe/($no+$yes+$maybe),3)); ?>% </td>
  </tr>
  <tr>
</table>

However, if they all have an equal amount of votes, i get a result like 33.333333333%. How do i reduce this to only one decimal place?

Thanks in advance!

Answer 1

by using round after you have multiplied by 100, not before.

<?php echo round(($no/($no+$yes+$maybe) * 100 ),1) ; ?>

Your code could also be simplified a little, to something like this

<?php
$votecount = $no+$yes+$maybe;
$yespercentage = round($yes / $votecount * 100,1);
$nopercentage =  round($no / $votecount * 100,1);
$maybepercentage =  round($maybe / $votecount * 100,1);
?>

<table>
  <tr>
    <td>Yes:</td>
    <td><img src="poll.gif"
width='<?php echo $yespercentage; ?>'
height='20'> <?php echo $yespercentage; ?>% </td>
  </tr>
  <tr>
    <td>No:</td>
    <td><img src="poll.gif"
width='<?php echo $nopercentage; ?>'
height='20'> <?php echo $nopercentage; ?>% </td>
  </tr>
  <tr>
    <td>Maybe:</td>
    <td><img src="poll.gif"
width='<?php echo $maybepercentage; ?>'
height='20'> <?php echo $maybepercentage; ?>% </td>
  </tr>
  <tr>
</table>