From: arpad at rajeczy dot com
Operating system: linux 2.6.13 x86_64
PHP version: 5CVS-2005-10-29 (CVS)
PHP Bug Type: Arrays related
Bug description: array_product() is broken
Description:
------------
The array_product() function is completely broken, it
returns 0 for all valid input and when the input is an
empty array.
Having looked at ext/standard/array.c, array_product()
seems to be a straight copy of array_sum(), but with '+'
replaced by '*'. As in array_sum(), the initial
return_value is 0, but because the elements are multiplied
with return_value rather than added to it, the result is
always 0.
Reproduce code:
---------------
<pre><?php
$tests = array(
'foo',
array(),
array(0),
array(3),
array(3, 3),
array(0.5, 2),
array(99999999, 99999999)
);
foreach ($tests as $v) {
echo 'testing: (', (is_array($v) ? implode(' * ', $v) : $v),
")\n\tresult: ";
var_dump(array_product($v));
echo "\n\n";
}
?></pre>
Expected result:
----------------
testing: (foo)
result:
Warning: array_product() [function.array-product]: The
argument should be an array
in /usr/local/apache2/htdocs/a/t.php on line 14
NULL
testing: ()
result:
Warning: array_product() [function.array-product]: Array
must contain at least one element
in /usr/local/apache2/htdocs/a/t.php on line 14
NULL
testing: (0)
result: int(0)
testing: (3)
result: int(3)
testing: (3 * 3)
result: int(9)
testing: (0.5 * 2)
result: float(1)
testing: (9999999 * 9999999)
result: int(99999980000001)
Actual result:
--------------
testing: (foo)
result:
Warning: array_product() [function.array-product]: The
argument should be an array
in /usr/local/apache2/htdocs/a/t.php on line 14
NULL
testing: ()
result: int(0)
testing: (0)
result: int(0)
testing: (3)
result: int(0)
testing: (3 * 3)
result: int(0)
testing: (0.5 * 2)
result: float(0)
testing: (99999999 * 99999999)
result: int(0)
--
Edit bug report at http://bugs.php.net/?id=35014&edit=1
--
Try a CVS snapshot (php4): http://bugs.php.net/fix.php?id=35014&r=trysnapshot4
Try a CVS snapshot (php5.0):
http://bugs.php.net/fix.php?id=35014&r=trysnapshot50
Try a CVS snapshot (php5.1):
http://bugs.php.net/fix.php?id=35014&r=trysnapshot51
Fixed in CVS: http://bugs.php.net/fix.php?id=35014&r=fixedcvs
Fixed in release: http://bugs.php.net/fix.php?id=35014&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=35014&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=35014&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=35014&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=35014&r=support
Expected behavior: http://bugs.php.net/fix.php?id=35014&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=35014&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=35014&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=35014&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=35014&r=php3
Daylight Savings: http://bugs.php.net/fix.php?id=35014&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=35014&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=35014&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=35014&r=float
No Zend Extensions: http://bugs.php.net/fix.php?id=35014&r=nozend
MySQL Configuration Error: http://bugs.php.net/fix.php?id=35014&r=mysqlcfg
