#47638 [Opn]: Random fatal error while using callback through array_udiff_assoc
ID: 47638
Updated by: felipe@php.net
Reported By: luke at cywh dot com
Status: Open
Bug Type: *Compile Issues
Operating System: Linux, Mac OS X
PHP Version: 5.2.9
New Comment:
I can't reproduce it.
Previous Comments:
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[2009-03-12 17:02:10] luke at cywh dot com
Description:
------------
When making a callback through array_udiff_assoc to a static function
this fatal error is produced, but randomly:
Fatal error: Non-static method (null)::(null)() cannot be called
statically in /opt/local/apache2/htdocs/site/cc.php on line 12
This error only occurs about 1/3 of the time or less, and usually
seems to happen right after saving a file. At first I thought it was
an eAccelerator issue as I could product this error almost every time
after re-saving the file (with or without changes), but I was also
able to reproduce this on my MacBook which I had installed the 5.2
branch on without any cache engines.
On a stock PHP installation with no extras it is mighty difficult to
reproduce this error. I was able to make it occur several times if I
refreshed the page 5-20 times after saving.
In the callback I'm referencing the function as a string:
"XC::greaterthan". I *think* using array('XC', 'greaterthan') corrects
the problem, but I am unsure as this error seems to occur completely
at random, and I have yet to have a 100% solid way of reproducing it.
The code below is the best way I was able to reproduce the occurrence.
Reproduce code:
---------------
class XC {
static public function greaterthan($value1, $value2) {
return $value1 > $value2;
}
}
class test {
function tester($num1, $num2) {
var_dump(array_intersect(
array_keys(
array_udiff_assoc(array('if' => $num1), array('if' => $num2),
'XC::greaterthan')
), array('if')
));
}
}
$t = new test();
for($i=0; $i<10; $i++) {
$num1 = mt_rand(1, 100);
$num2 = mt_rand(1, 100);
$t->tester($num1, $num2);
}
Expected result:
----------------
No fatal error, just var dumps.
Actual result:
--------------
Fatal error: Non-static method (null)::(null)() cannot be called
statically in /opt/local/apache2/htdocs/site/cc.php on line 12
(Which points to the array_udiff_assoc function)
------------------------------------------------------------------------
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