ID: 37949
User updated by: delta407 at lerfjhax dot com
Reported By: delta407 at lerfjhax dot com
Status: Bogus
Bug Type: *General Issues
Operating System: Linux
PHP Version: 5.1.4
New Comment:
This may be expected by you and other PHP developers, but
again, is not present in the documentation. I double-checked
the documentation, and it says nothing about raising a warning
on an empty input array.
In fact, it says the opposite ("can compare an unlimited
number of values") -- unlimited implies that there is no
artificial bound at zero values. Again, please update the
documentation to reflect this.
Previous Comments:
------------------------------------------------------------------------
[2006-06-28 17:29:44] [EMAIL PROTECTED]
Thank you for taking the time to write to us, but this is not
a bug. Please double-check the documentation available at
http://www.php.net/manual/ and the instructions on how to report
a bug at http://bugs.php.net/how-to-report.php
This is expected.
------------------------------------------------------------------------
[2006-06-28 15:39:12] delta407 at lerfjhax dot com
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 this bug report at http://bugs.php.net/?id=37949&edit=1
