From: delta407 at lerfjhax dot com
Operating system: Linux
PHP version: 5.1.4
PHP Bug Type: *General Issues
Bug description: max() fails on empty arrays
Description:
------------
max() throws a warning when given an empty array. The
documentation reads:
"If the first and only parameter is an array, max() returns
the highest value in that array. ... You can compare an
unlimited number of values."
"Unlimited number of values", by definition of unlimited,
includes zero values. (If there aren't any values in the
array, the highest value is the value null.) This is
consistent with other max() implementations -- MySQL, Oracle,
Postgres, Ruby...
Please either remove the warning and return null, or update
the documentation to reflect the existence of the warning.
Reproduce code:
---------------
<?
$a = array(1,3,2);
function foo() {
global $a;
$v = max($a);
echo is_null($v) ? "(null)\n" : "$v\n";
array_pop($a);
}
foo($a);
foo($a);
foo($a);
foo($a);
?>
Expected result:
----------------
3
3
1
(null)
Actual result:
--------------
3
3
1
PHP Warning: max(): Array must contain atleast one element in
foo.php on line 6
--
Edit bug report at http://bugs.php.net/?id=37949&edit=1
--
Try a CVS snapshot (PHP 4.4):
http://bugs.php.net/fix.php?id=37949&r=trysnapshot44
Try a CVS snapshot (PHP 5.2):
http://bugs.php.net/fix.php?id=37949&r=trysnapshot52
Try a CVS snapshot (PHP 6.0):
http://bugs.php.net/fix.php?id=37949&r=trysnapshot60
Fixed in CVS: http://bugs.php.net/fix.php?id=37949&r=fixedcvs
Fixed in release:
http://bugs.php.net/fix.php?id=37949&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=37949&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=37949&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=37949&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=37949&r=support
Expected behavior: http://bugs.php.net/fix.php?id=37949&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=37949&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=37949&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=37949&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=37949&r=php3
Daylight Savings: http://bugs.php.net/fix.php?id=37949&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=37949&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=37949&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=37949&r=float
No Zend Extensions: http://bugs.php.net/fix.php?id=37949&r=nozend
MySQL Configuration Error: http://bugs.php.net/fix.php?id=37949&r=mysqlcfg
