#42140 [Bgs->Opn]: comma expression doesn't work outside for operator

ID: 42140 User updated by: dmitry at rsl dot ru Reported By: dmitry at rsl dot ru -Status: Bogus +Status: Open Bug Type: Scripting Engine problem Operating System: linux PHP Version: 5.2.3 New Comment: Actually documentation has nothing about comma expression, the only way to know about it is to view example 4 of 'for' operator. Though, it is also mentioned but not explained in Operator Precedence part of chapter 15. Well, this syntax works inside 'for' structure, so it is supported, why not to allow to use this syntax in other expressions also? Previous Comments: ------------------------------------------------------------------------ [2007-07-29 15:26:46] derick@php.net Thank you for taking the time to write to us, but this is not a bug. Please double-check the documentation available at http://www.php.net/manual/ and the instructions on how to report a bug at http://bugs.php.net/how-to-report.php This syntax is simply not supported, and that is expected. ------------------------------------------------------------------------ [2007-07-29 14:31:42] dmitry at rsl dot ru Description: ------------ comma expression doesn't work outside for operator: this works: <? for($z = $a=2,$b=1;false;); echo "z=$z a=$a b=$b"; ?> this doesn't: <? $z = $a=2,$b=1; echo "z=$z a=$a b=$b"; ?> Parse error: syntax error, unexpected ',' in /home/dmitry/x.php on line 1 Reproduce code: --------------- <? $z = $a=2,$b=1; echo "z=$z a=$a b=$b"; ?> Expected result: ---------------- z=2 a=2 b=1 Actual result: -------------- Parse error: syntax error, unexpected ',' in /home/dmitry/x.php on line 1 ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=42140&edit=1