From: grant at tattomedia dot com
Operating system: Linux
PHP version: 5.3CVS-2008-12-01 (snap)
PHP Bug Type: Unknown/Other Function
Bug description: For loop doesn't work as expected with decimals
Description:
------------
My PHP version is PHP 5.2.5 (cli): This wasn't listed in the select.
It seems that a for loop that deals with floats has bad logic when
evaluating equivalence against another number (in my situation an int).
Reproduce code:
---------------
$values = array();
for ($val = 0; $val <= 2; $val = $val + .1) {
$values[] = $val;
}
print_r($values);
Expected result:
----------------
Array ( [0] => 0 [1] => 0.1 [2] => 0.2 [3] => 0.3 [4] => 0.4 [5] => 0.5
[6] => 0.6 [7] => 0.7 [8] => 0.8 [9] => 0.9 [10] => 1 [11] => 1.1 [12] =>
1.2 [13] => 1.3 [14] => 1.4 [15] => 1.5 [16] => 1.6 [17] => 1.7 [18] => 1.8
[19] => 1.9 [20] => 2 )
Actual result:
--------------
Array ( [0] => 0 [1] => 0.1 [2] => 0.2 [3] => 0.3 [4] => 0.4 [5] => 0.5
[6] => 0.6 [7] => 0.7 [8] => 0.8 [9] => 0.9 [10] => 1 [11] => 1.1 [12] =>
1.2 [13] => 1.3 [14] => 1.4 [15] => 1.5 [16] => 1.6 [17] => 1.7 [18] => 1.8
[19] => 1.9 )
--
Edit bug report at http://bugs.php.net/?id=46727&edit=1
--
Try a CVS snapshot (PHP 5.2):
http://bugs.php.net/fix.php?id=46727&r=trysnapshot52
Try a CVS snapshot (PHP 5.3):
http://bugs.php.net/fix.php?id=46727&r=trysnapshot53
Try a CVS snapshot (PHP 6.0):
http://bugs.php.net/fix.php?id=46727&r=trysnapshot60
Fixed in CVS:
http://bugs.php.net/fix.php?id=46727&r=fixedcvs
Fixed in CVS and need be documented:
http://bugs.php.net/fix.php?id=46727&r=needdocs
Fixed in release:
http://bugs.php.net/fix.php?id=46727&r=alreadyfixed
Need backtrace:
http://bugs.php.net/fix.php?id=46727&r=needtrace
Need Reproduce Script:
http://bugs.php.net/fix.php?id=46727&r=needscript
Try newer version:
http://bugs.php.net/fix.php?id=46727&r=oldversion
Not developer issue:
http://bugs.php.net/fix.php?id=46727&r=support
Expected behavior:
http://bugs.php.net/fix.php?id=46727&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=46727&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=46727&r=submittedtwice
register_globals:
http://bugs.php.net/fix.php?id=46727&r=globals
PHP 4 support discontinued: http://bugs.php.net/fix.php?id=46727&r=php4
Daylight Savings: http://bugs.php.net/fix.php?id=46727&r=dst
IIS Stability:
http://bugs.php.net/fix.php?id=46727&r=isapi
Install GNU Sed:
http://bugs.php.net/fix.php?id=46727&r=gnused
Floating point limitations:
http://bugs.php.net/fix.php?id=46727&r=float
No Zend Extensions:
http://bugs.php.net/fix.php?id=46727&r=nozend
MySQL Configuration Error:
http://bugs.php.net/fix.php?id=46727&r=mysqlcfg
