Bug #60892 [Com]: money_format returning inconsistent results

Edit report at https://bugs.php.net/bug.php?id=60892&edit=1 ID: 60892 Comment by: gregs at net-virtual dot com Reported by: gregs at net-virtual dot com Summary: money_format returning inconsistent results Status: Open Type: Bug Package: Math related Operating System: OSX PHP Version: 5.3.9 Block user comment: N Private report: N New Comment: Also I should add that if I do this: $a = 8.930 + 70687.465; instead of this: $a = 70687.465 + 8.930; It works. The round() function seems to behave correctly in either case. I cannot tell from this behavior if the problem is in number_format (which may not be calling round(), but doing its own flawed rounding) or if it something deeper in how PHP is storing floats/doubles. Previous Comments: ------------------------------------------------------------------------ [2012-01-26 14:54:08] gregs at net-virtual dot com Here is a easier to read version of the test code (I also added one more): $a = 70687.465 + 8.930; $b = 70696.395; $c = 70687.464 + 8.936; $d = 70687.464 + 8.931; printf("A: %s %s %.9f\n", $a, money_format("%.2n", $a), $a); printf("B: %s %s %.9f\n", $b, money_format("%.2n", $b), $b); printf("C: %s %s %.9f\n", $c, money_format("%.2n", $c), $c); printf("D: %s %s %.9f\n", $d, money_format("%.2n", $d), $d); Output: A: 70696.395 70696.39 70696.395000000 B: 70696.395 70696.40 70696.395000000 C: 70696.4 70696.40 70696.400000000 D: 70696.395 70696.40 70696.395000000 ------------------------------------------------------------------------ [2012-01-26 14:47:43] gregs at net-virtual dot com Description: ------------ php -r '$a = 70687.465 + 8.930;$b = 70696.395;$c = 70687.464 + 8.936;printf("A: %s %s %.9f\n", $a, money_format("%.2n", $a), $a);printf("B: %s %s %.9f\n", $b, money_format("%.2n", $b), $b);printf("C: %s %s %.9f\n", $c, money_format("%.2n", $c), $c);' Output: A: 70696.395 70696.39 70696.395000000 B: 70696.395 70696.40 70696.395000000 C: 70696.4 70696.40 70696.400000000 Why is A not getting rounded up to 70696.40? Test script: --------------- php -r '$a = 70687.465 + 8.930;$b = 70696.395;$c = 70687.464 + 8.936;printf("A: %s %s %.9f\n", $a, money_format("%.2n", $a), $a);printf("B: %s %s %.9f\n", $b, money_format("%.2n", $b), $b);printf("C: %s %s %.9f\n", $c, money_format("%.2n", $c), $c);' Expected result: ---------------- A: 70696.395 70696.40 70696.395000000 B: 70696.395 70696.40 70696.395000000 C: 70696.4 70696.40 70696.400000000 Actual result: -------------- A: 70696.395 70696.39 70696.395000000 B: 70696.395 70696.40 70696.395000000 C: 70696.4 70696.40 70696.400000000 ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=60892&edit=1