Bug #12505 Updated: array_sum function total calculate error

ID: 12505 Updated by: jeroen Reported By: omeroz@kamilkoc.com.tr Old Status: Assigned Status: Closed Bug Type: Arrays related Operating System: Red Hat Linux 6.1 PHP Version: latest CVS (08/01/01) Assigned To: jeroen New Comment: Fixed in CVS, will be in 4.0.7 Previous Comments: ------------------------------------------------------------------------ [2001-08-01 16:55:46] jeroen@php.net Hm, same problem as the other overflow-things. Assigned to myself. Are there other dangerous functions like this anywhere? ------------------------------------------------------------------------ [2001-08-01 08:36:20] andy@php.net status -> analyzed ------------------------------------------------------------------------ [2001-08-01 05:56:08] jmcastagnetto@php.net The problem is with the typecasting to LONG, if you use the code: <?php $tt=array(382478633.0,367687181.0,452504275.0,471367521.0,848270658.0,1181944543.0); echo array_sum($tt)."\n"; ?> The result is the correct one (3704252811) Solution would be to 1) use floating point representation for bign numbers in PHP code (add caveat to the manual perhaps?) or 2) check that the array_sum result is nor overflowing LONG in the C code implementation and bump the type to DOUBLE if it does. second option would be better IMHO ------------------------------------------------------------------------ [2001-08-01 04:02:52] omeroz@kamilkoc.com.tr $tt=array(382478633,367687181,452504275,471367521,848270658,1181944543); $total_tt=array_sum($tt); echo "Total_tt=".$total_tt; // Prints Total_tt=-590714485 Must be 3704252811. ------------------------------------------------------------------------ Edit this bug report at http://bugs.php.net/?id=12505&edit=1