Bug #75730 [Com]: Stuck on is_null()

Edit report at https://bugs.php.net/bug.php?id=75730&edit=1 ID: 75730 Comment by: momchil at bojinov dot info Reported by: momchil at bojinov dot info Summary: Stuck on is_null() Status: Feedback Type: Bug Package: Scripting Engine problem Operating System: Windows 10 PHP Version: 7.1.12 Assigned To: cmb Block user comment: N Private report: N New Comment: Daverandom, please accept my apologies Thank you guys for explaining it to me .. twice For the record, strict standards should be On by default Previous Comments: ------------------------------------------------------------------------ [2017-12-25 22:44:23] cmb@php.net > 1 question though - did you run the script on Windows 10 X64 ? Have you read <https://bugs.php.net/how-to-report.php>? :) Anyhow, from looking at the code[1] it seems that daverandom's comment is dead on – if $Ticks' value is an empty string (for example), the for loop in the else branch is not unlikely to be infinite. Please comment out the for loop and see whether that solves *this* issue. [1] <https://github.com/bozhinov/pChart2.0-for-PHP7/blob/f772ff8e0fc10b2e7e9c12e56637870cbcd12a27/pChart/pDraw.php#L827-L831> ------------------------------------------------------------------------ [2017-12-25 21:45:25] momchil at bojinov dot info 1 question though - did you run the script on Windows 10 X64 ? Im told a picture is worth a 1000 words here is 1: http://bojinov.info/momchil/PHP/Capture.png Would you like another one where I have commented line 770 and uncommented line 771 ? ------------------------------------------------------------------------ [2017-12-25 21:18:25] daverandom@php.net Not enough information was provided for us to be able to handle this bug. Please re-read the instructions at http://bugs.php.net/how-to-report.php If you can provide more information, feel free to add it to this bug and change the status back to "Open". Thank you for your interest in PHP. The two lines you show are not functionally identical. is_null($Ticks) returns true only when $Ticks is null (it is equivalent to the $Ticks === null strict comparison), whereas $Ticks == null will return true when $Ticks is null, false, int(0), an empty string or an empty arrsy. Please debug your code, as the problem does not lie in PHP. For more information, please check the type comparison tables here: http://php.net/manual/en/types.comparisons.php#types.comparisions-loose ------------------------------------------------------------------------ [2017-12-25 20:46:45] momchil at bojinov dot info forgot to mention faulting line: pDraw.php:770 ------------------------------------------------------------------------ [2017-12-25 20:45:32] momchil at bojinov dot info Description: ------------ Hello, I m refactoring some old code and I hit a roadblock if (is_null($Ticks)) { - That one gets PHP.EXE stuck consuming lots of CPU #if ($Ticks == NULL) { - That one runs fine I have packaged the entire solution: bojinov.info/momchil/php/bug.zip It contains PHP 7.1.12 x64 TS with all the needed scripts to execute run php examples\example.basic.php Test script: --------------- php examples\example.basic.php Expected result: ---------------- nothing Actual result: -------------- PHP hangs ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=75730&edit=1