#46727 [NEW]: For loop doesn't work as expected with decimals

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