Bug #68445 [Opn]: Optional arguments may precede required arguments in function declarations

Edit report at https://bugs.php.net/bug.php?id=68445&edit=1 ID: 68445 User updated by: ajf at ajf dot me Reported by: ajf at ajf dot me Summary: Optional arguments may precede required arguments in function declarations Status: Open Type: Bug Package: Scripting Engine problem Operating System: OS X Yosemite PHP Version: 5.6.3 Block user comment: N Private report: N New Comment: That's a fair point. This would change if nullable typehints (as proposed by Levi's RFC: https://wiki.php.net/rfc/nullable_typehints) were added. Previous Comments: ------------------------------------------------------------------------ [2014-11-18 20:08:50] mike@php.net Mind that this is also the only way to declare an argument with a nullable class hint. ------------------------------------------------------------------------ [2014-11-18 19:47:12] ajf at ajf dot me Description: ------------ Optional arguments can be specified before required arguments, which would suggest that you can omit them. Yet, if you actually call the function, it will complain that you didn't pass the required arguments. The fix would be either to support optional arguments before required arguments at call-time, or to error when this is done in a function declaration. Test script: --------------- <?php function foo($a = NULL, $b) { var_dump($b); } foo(2); Expected result: ---------------- int(2) Actual result: -------------- Warning: Missing argument 2 for foo(), called in %s on line 7 and defined in /in/b1HC3 on line 3 Notice: Undefined variable: b in %s on line 4 NULL ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=68445&edit=1