#48484 [NEW]: array_product(array()) returns 0 instead of 1.

From: zhalassy at loginet dot hu Operating system: Any PHP version: 5.2.9 PHP Bug Type: Math related Bug description: array_product(array()) returns 0 instead of 1. Description: ------------ array_product(array()) returns 0 instead of 1. Empty product is 1 (hence "1" is neutral in multiplication) in mathematics. Example: array_product(array(1,2)) * array_product(array(3,4)) === /* should be */ array_product(array()) * array_product(array(1,2,3,4)); example implementation: function array_product($array){ $product = 1; foreach($array as $element) $product *= $element; return $product; } Reproduce code: --------------- echo product_array(array()); Expected result: ---------------- It should return 1. Actual result: -------------- It returns 0. -- Edit bug report at http://bugs.php.net/?id=48484&edit=1 -- Try a CVS snapshot (PHP 5.2): http://bugs.php.net/fix.php?id=48484&r=trysnapshot52 Try a CVS snapshot (PHP 5.3): http://bugs.php.net/fix.php?id=48484&r=trysnapshot53 Try a CVS snapshot (PHP 6.0): http://bugs.php.net/fix.php?id=48484&r=trysnapshot60 Fixed in CVS: http://bugs.php.net/fix.php?id=48484&r=fixedcvs Fixed in CVS and need be documented: http://bugs.php.net/fix.php?id=48484&r=needdocs Fixed in release: http://bugs.php.net/fix.php?id=48484&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=48484&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=48484&r=needscript Try newer version: http://bugs.php.net/fix.php?id=48484&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=48484&r=support Expected behavior: http://bugs.php.net/fix.php?id=48484&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=48484&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=48484&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=48484&r=globals PHP 4 support discontinued: http://bugs.php.net/fix.php?id=48484&r=php4 Daylight Savings: http://bugs.php.net/fix.php?id=48484&r=dst IIS Stability: http://bugs.php.net/fix.php?id=48484&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=48484&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=48484&r=float No Zend Extensions: http://bugs.php.net/fix.php?id=48484&r=nozend MySQL Configuration Error: http://bugs.php.net/fix.php?id=48484&r=mysqlcfg