#38130 [NEW]: Unwritten rule on functions returning null

From: btherl at yahoo dot com dot au Operating system: Linux PHP version: Irrelevant PHP Bug Type: Documentation problem Bug description: Unwritten rule on functions returning null Description: ------------ Most functions return NULL if their arguments are invalid. This should be documented somewhere, perhaps in "Internal (built-in) functions". It may be useful to document it in the documentation for NULL itself. -- Edit bug report at http://bugs.php.net/?id=38130&edit=1 -- Try a CVS snapshot (PHP 4.4): http://bugs.php.net/fix.php?id=38130&r=trysnapshot44 Try a CVS snapshot (PHP 5.2): http://bugs.php.net/fix.php?id=38130&r=trysnapshot52 Try a CVS snapshot (PHP 6.0): http://bugs.php.net/fix.php?id=38130&r=trysnapshot60 Fixed in CVS: http://bugs.php.net/fix.php?id=38130&r=fixedcvs Fixed in release: http://bugs.php.net/fix.php?id=38130&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=38130&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=38130&r=needscript Try newer version: http://bugs.php.net/fix.php?id=38130&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=38130&r=support Expected behavior: http://bugs.php.net/fix.php?id=38130&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=38130&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=38130&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=38130&r=globals PHP 3 support discontinued: http://bugs.php.net/fix.php?id=38130&r=php3 Daylight Savings: http://bugs.php.net/fix.php?id=38130&r=dst IIS Stability: http://bugs.php.net/fix.php?id=38130&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=38130&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=38130&r=float No Zend Extensions: http://bugs.php.net/fix.php?id=38130&r=nozend MySQL Configuration Error: http://bugs.php.net/fix.php?id=38130&r=mysqlcfg