#36065 [NEW]: is_infinite & is_finite

From: goth at spellforce dot ru Operating system: unix PHP version: 5.1.2 PHP Bug Type: Math related Bug description: is_infinite & is_finite Description: ------------ Hello, I've incountered a following mistake in your is_infinite function - why does it return 'false' in the following example? Here is_infinite returns 'false' and is_finite - convercely, 'true'. Reproduce code: --------------- <?PHP $T1=1; $T2=0; if (is_infinite($T1/$T2)) { $R="value is infinite"; // 1) } else { $R="value is finite"; // 2) } echo $R; ?> So this script outputs 2) instead of 1), but it's incorrect Expected result: ---------------- From the maths. analisys follows, that constant / zero = infinity So the answer must be "value is infinite" not ="value is finite"! -- Edit bug report at http://bugs.php.net/?id=36065&edit=1 -- Try a CVS snapshot (PHP 4.4): http://bugs.php.net/fix.php?id=36065&r=trysnapshot44 Try a CVS snapshot (PHP 5.1): http://bugs.php.net/fix.php?id=36065&r=trysnapshot51 Try a CVS snapshot (PHP 6.0): http://bugs.php.net/fix.php?id=36065&r=trysnapshot60 Fixed in CVS: http://bugs.php.net/fix.php?id=36065&r=fixedcvs Fixed in release: http://bugs.php.net/fix.php?id=36065&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=36065&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=36065&r=needscript Try newer version: http://bugs.php.net/fix.php?id=36065&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=36065&r=support Expected behavior: http://bugs.php.net/fix.php?id=36065&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=36065&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=36065&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=36065&r=globals PHP 3 support discontinued: http://bugs.php.net/fix.php?id=36065&r=php3 Daylight Savings: http://bugs.php.net/fix.php?id=36065&r=dst IIS Stability: http://bugs.php.net/fix.php?id=36065&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=36065&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=36065&r=float No Zend Extensions: http://bugs.php.net/fix.php?id=36065&r=nozend MySQL Configuration Error: http://bugs.php.net/fix.php?id=36065&r=mysqlcfg