Edit report at https://bugs.php.net/bug.php?id=27759&edit=1
ID: 27759
Comment by: good821 at 126 dot com
Reported by: patrick at rap-x dot com
Summary: bcadd() causes crash if first parameter is empty
string
Status: Closed
Type: Bug
Package: BC math related
Operating System: win32 only
PHP Version: 5.0.0RC1
Block user comment: N
Private report: N
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Previous Comments:
------------------------------------------------------------------------
[2004-07-26 19:58:57] pollita@php.net
The fix was located just *after* the release of 5.0.0 (literally, like, the next day), look for it
in 5.0.1.
------------------------------------------------------------------------
[2004-07-25 00:22:19] davesk78 at yahoo dot com
This bug still exists in the final release (5.0.0). I'm running Apache 2, PHP 5.0.0, and
Windows XP Pro. Same test case:
$total = "0";
$diff = "";
$result = bcadd($total, $diff, 6);
echo $result;
exit;
The following also causes Apache to crash:
$total = "0";
$diff = "";
$result = bcpow($total, $diff, 6);
echo $result;
exit;
------------------------------------------------------------------------
[2004-07-07 15:48:45] pk at onpk dot net
The reproduce code still crashes on my box Windows 2000 pro, Apache 1.3.27, PHP5 build 2195. And not
only with "bcadd" but also with :
$total = "0";
$diff = "";
bcpow($total, $diff, 6);
And :
$total = "0";
$diff = "";
bcsub($total, $diff, 6);
However I've to admit that ttt_cao at hotmail dot com's remedy does work. By the way,
I'm not using PEAR`s
Benchmark_Timer.
Hope someone will look at this. Thanks in advance.
Perrick :: http://www.onpk.net/
------------------------------------------------------------------------
[2004-06-29 18:51:18] ttt_cao at hotmail dot com
update the function getProfiling() in timer.php as the follows, maybe you can fix the bug.
function getProfiling() {
$i = 0;
$total = $temp = '0.0';
$result = array();
foreach ($this->markers as $marker => $time) {
if (extension_loaded('bcmath')) {
$diff = bcsub($time, $temp, 6);
if ($i > 0)
$total = bcadd($total, $diff, 6);
} else {
$diff = $time - $temp;
$total = $total + $diff;
}
echo "$time $diff $total <br>";
$result[$i]['name'] = $marker;
$result[$i]['time'] = $time;
$result[$i]['diff'] = $diff;
$result[$i]['total'] = $total;
$this->strlen_max = (strlen($marker) > $this->strlen_max ? strlen($marker) + 1
: $this->strlen_max);
$temp = $time;
$i++;
}
$result[0]['diff'] = '-';
$this->strlen_max = (strlen('total') > $this->strlen_max ?
strlen('total') : $this->strlen_max);
$this->strlen_max += 4;
return $result;
}
------------------------------------------------------------------------
[2004-06-18 01:21:42] rashid at ds dot pg dot gda dot pl
bug is closed so i dare to add 'me too' so maybe someone will reopen it :]
php5 rc2: problem exists in both bc_sub and bc_add (PEAR`s Benchmark_Timer works great as perfect
example of this bug)
------------------------------------------------------------------------
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https://bugs.php.net/bug.php?id=27759
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