Bug #74974 [NEW]: NAN Comparison

From: webmaster at icecub dot nl Operating system: PHP version: 7.2Git-2017-07-22 (Git) Package: Math related Bug Type: Bug Bug description:NAN Comparison Description: ------------ NAN Comparison is giving unexpected results since PHP version 5.4.0 up till the latest 7.2.0beta1. I know NAN comparison should be avoided. It's just a bug report. Test script: --------------- $nan = NAN; if(0 < NAN){ echo 'TRUE'; } else { echo 'FALSE'; } echo "\n"; if(0 < $nan){ echo 'TRUE'; } else { echo 'FALSE'; } Expected result: ---------------- Expected output in example script: TRUE TRUE Actual result: -------------- Output versions 7.0.0 - 7.2.0beta1: TRUE FALSE Output versions 5.4.0 - 5.6.30, hhvm-3.10.1 - 3.19.0: FALSE FALSE Output versions 4.3.6 - 5.3.29: TRUE TRUE -- Edit bug report at https://bugs.php.net/bug.php?id=74974&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=74974&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=74974&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=74974&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=74974&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=74974&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=74974&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=74974&r=needscript Try newer version: https://bugs.php.net/fix.php?id=74974&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=74974&r=support Expected behavior: https://bugs.php.net/fix.php?id=74974&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=74974&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=74974&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=74974&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=74974&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=74974&r=dst IIS Stability: https://bugs.php.net/fix.php?id=74974&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=74974&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=74974&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=74974&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=74974&r=mysqlcfg