Edit report at https://bugs.php.net/bug.php?id=60393&edit=1
ID: 60393 Comment by: anon at anon dot anon Reported by: athlan at vgroup dot pl Summary: Generating minus-zero with ceil() Status: Bogus Type: Bug Package: Math related Operating System: MacOSX Snow Leopard PHP Version: 5.3.8 Block user comment: N Private report: N New Comment: That's correct. Like virtually all modern languages and CPUs, PHP implements the representation and behavior of floating-point numbers according to the standard "IEEE 754". Negative zero is a feature of that standard: http://en.wikipedia.org/wiki/Signed_zero Previous Comments: ------------------------------------------------------------------------ [2011-11-26 15:04:07] cataphr...@php.net Sorry, but your problem does not imply a bug in PHP itself. For a list of more appropriate places to ask for help using PHP, please visit http://www.php.net/support.php as this bug system is not the appropriate forum for asking support questions. Due to the volume of reports we can not explain in detail here why your report is not a bug. The support channels will be able to provide an explanation for you. Thank you for your interest in PHP. IEEE 754-2008, definition 2.1.25: (...) All floating-point numbers, including zeros and infinities, are signed. ------------------------------------------------------------------------ [2011-11-26 08:29:34] athlan at vgroup dot pl Description: ------------ --- >From manual page: >http://www.php.net/function.ceil#refsect1-function.ceil-unknown --- You can generate a minus-zero, which is invalid number: <?php echo ceil(-0.3); ?> Test script: --------------- <?php echo ceil(-0.3); ?> Expected result: ---------------- <?php echo ceil(-0.3); // should return 0, not -0 ?> Actual result: -------------- <?php echo ceil(-0.3); // returns -0 ?> ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=60393&edit=1
