Bug #16544 Updated: Floating point calculation bug or float() function bug

ID: 16544 Updated by: chris@owta.net Reported By: chris@owta.net Status: Bogus Bug Type: Math related Operating System: Windows PHP Version: 4.1.2 New Comment: Why is this a support question? The bug is in the way the floor function and the floating point internals in PHP are working. The floor function is rounding a number down incorrectly. Previous Comments: ------------------------------------------------------------------------ [2002-04-11 06:21:52] sander@php.net The bug system is not the appropriate forum for asking support questions. For a list of a range of more appropriate places to ask for help using PHP, please visit http://www.php.net/support.php ------------------------------------------------------------------------ [2002-04-11 04:55:49] chris@owta.net Here's the code <? $quantities = array(5000.00, 1000.00, 200.00); $amount = 6200; debug($quantities); foreach ($quantities as $quantity) { $divVal = ($amount/$quantity); echo ++$i.". Quantity:\n".$quantity."<BR>"; echo "divVal: ".$divVal." - ".var_dump($divVal)."<BR>\n"; echo "Amount: ".$amount."\n"; if (floor($divVal) > 0) { echo "&nbsp;[floored divVal is greater than zero]\n"; $amount = ($divVal - floor($divVal)) * $quantity; } echo "<BR><BR>"; } ?> You'll see the floor function is operating incorrectly? ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=16544&edit=1