From: [EMAIL PROTECTED]
Operating system: Windows 2000
PHP version: 4.1.1
PHP Bug Type: Output Control
Bug description: Math output errors
I wrote a script which output Pascal's triangle and then showed the numbers
which were divisible by a certain number in a different colour. At first,
this works fine. Then after the 20th row or so, the % operator starts
outputting incorrect numbers. For example, 37 % 4 returns 1. 24 % 4
returns 3. When those numbers are checked on their own, it works fine.
In the loops though, it starts giving incorrect information after 20 rows.
You can see this at www.alkaline2.com/triangle.php
CODE
<?
$rows--;
for ($r = 0; $r <= $rows; $r++)
{
if ($hidenum) print "<table cellpadding='0' cellspacing='0' border='1'
bordercolor='#000088' borderstyle='solid'><tr>\n";
if (!$hidenum) print "<table cellpadding='2' cellspacing='1'
border='0'><tr>\n";
for ($i = 0; $i <= $r; $i++)
{
$num = factorial($r)/(factorial($r - $i) * factorial($i));
if ($divisor > 0 && $num % $divisor == 0)
{
$bgcolor='#ff0000';
}
else
{
$bgcolor='#444444';
}
if (!$hidenum) print "<td bgcolor='$bgcolor'><span
class='text'>$num</span></td>\n";
$check = $num % $divisor;
if ($hidenum && $divisor > 0 && $num % $divisor == 0) print "<td><img
src='red.gif' width='$size' height='$size' alt='$num % $divisor =
$check'></td>\n";
if ($hidenum && $divisor > 0 && $num % $divisor != 0) print "<td><img
src='grey.gif' width='$size' height='$size' alt='$num % $divisor =
$check'></td>\n";
if ($hidenum && $divisor == 0) print "<td><img src='grey.gif'
width='$size' height='$size' alt='$num % $divisor = $check'></td>\n";
}
print "</tr></table>";
}
function factorial($x)
{
$total = 1;
for ($i = $x; $i > 1; $i--)
$total = $total * $i;
return $total;
}
?>
--
Edit bug report at http://bugs.php.net/?id=15946&edit=1
--
Fixed in CVS: http://bugs.php.net/fix.php?id=15946&r=fixedcvs
Fixed in release: http://bugs.php.net/fix.php?id=15946&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=15946&r=needtrace
Try newer version: http://bugs.php.net/fix.php?id=15946&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=15946&r=support
Expected behavior: http://bugs.php.net/fix.php?id=15946&r=notwrong
Not enough info: http://bugs.php.net/fix.php?id=15946&r=notenoughinfo
Submitted twice: http://bugs.php.net/fix.php?id=15946&r=submittedtwice
