#47638 [Opn->Fbk]: Random fatal error while using callback through array_udiff_assoc

ID: 47638 Updated by: jani@php.net Reported By: luke at cywh dot com -Status: Open +Status: Feedback Bug Type: Scripting Engine problem Operating System: Linux, Mac OS X PHP Version: 5.2.9 New Comment: Not enough information was provided for us to be able to handle this bug. Please re-read the instructions at http://bugs.php.net/how-to-report.php If you can provide more information, feel free to add it to this bug and change the status back to "Open". Thank you for your interest in PHP. Previous Comments: ------------------------------------------------------------------------ [2009-03-19 00:34:23] luke at cywh dot com I'm having problems with my MacBook, so I can't get that working on that (I had installed a seperate install of Apache 2 and PHP separate from the OS, and I get an error regarding libpng with the php5 module, which is preventing me from stoping/starting the service). I was, however, able to produce the same exact error on my development machine, but this time I had used array('XC', 'greaterthan') instead of 'XC::greaterthan'. This is a live server with a bunch of websites (cpanel install). Is there anyway to do this without interring with the rest of the server? Perhaps start the apache instance on a different port? Seems to always happen randomly... has happened twice today during development. ------------------------------------------------------------------------ [2009-03-15 12:22:57] jani@php.net Run single Apache child in gdb, then you can backtrace and dump variables once this happens. Or run the same in CLI. And I hope you're NOT using some threaded MPM with Apache? (I'm guessing you're using Apache2 of course since you didn't bother telling that either..) ------------------------------------------------------------------------ [2009-03-13 14:10:28] luke at cywh dot com Is there any way to log what happens when I reproduce it? It's really difficult to get it to occur. ------------------------------------------------------------------------ [2009-03-13 01:03:50] felipe@php.net I can't reproduce it. ------------------------------------------------------------------------ [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) ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=47638&edit=1