Bug #53104 [NEW]: min() and max() treat null differently

From: Operating system: Windows 2000 Pro SP4 PHP version: 5.3.3 Package: Math related Bug Type: Bug Bug description:min() and max() treat null differently Description: ------------ The min() and max() functions treat null values as "negative infinity", which is not documented or (to me) particularly intuitive. I would expect null to either be treated as 0 (as "(int)null" does), or ignore it entirely (which min() does not, but max() does by virtue of any value being greater than negative infinity). Test script: --------------- echo "min(-1,null) = "; var_dump(min(-1,null)); echo "\n"; /* NULL */ echo "min( 1,null) = "; var_dump(min( 1,null)); echo "\n"; /* NULL */ echo "max(-1,null) = "; var_dump(max(-1,null)); echo "\n"; /* int(-1) */ echo "max( 1,null) = "; var_dump(max( 1,null)); echo "\n"; /* int(1) */ Expected result: ---------------- min(-1,null) = int(-1) min( 1,null) = int(1 or 0) max(-1,null) = int(-1 or 0) max( 1,null) = int(1) Actual result: -------------- min(-1,null) = NULL min( 1,null) = NULL max(-1,null) = int(-1) max( 1,null) = int(1) -- Edit bug report at http://bugs.php.net/bug.php?id=53104&edit=1 -- Try a snapshot (PHP 5.2): http://bugs.php.net/fix.php?id=53104&r=trysnapshot52 Try a snapshot (PHP 5.3): http://bugs.php.net/fix.php?id=53104&r=trysnapshot53 Try a snapshot (trunk): http://bugs.php.net/fix.php?id=53104&r=trysnapshottrunk Fixed in SVN: http://bugs.php.net/fix.php?id=53104&r=fixed Fixed in SVN and need be documented: http://bugs.php.net/fix.php?id=53104&r=needdocs Fixed in release: http://bugs.php.net/fix.php?id=53104&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=53104&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=53104&r=needscript Try newer version: http://bugs.php.net/fix.php?id=53104&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=53104&r=support Expected behavior: http://bugs.php.net/fix.php?id=53104&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=53104&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=53104&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=53104&r=globals PHP 4 support discontinued: http://bugs.php.net/fix.php?id=53104&r=php4 Daylight Savings: http://bugs.php.net/fix.php?id=53104&r=dst IIS Stability: http://bugs.php.net/fix.php?id=53104&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=53104&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=53104&r=float No Zend Extensions: http://bugs.php.net/fix.php?id=53104&r=nozend MySQL Configuration Error: http://bugs.php.net/fix.php?id=53104&r=mysqlcfg