Doc->Req #76135 [Nab->Opn]: isset should support expressions like empty does

Edit report at https://bugs.php.net/bug.php?id=76135&edit=1 ID: 76135 Updated by: requinix@php.net Reported by: faith dot morante at gmail dot com -Summary: Issue with Isset +Summary: isset should support expressions like empty does -Status: Not a bug +Status: Open -Type: Documentation Problem +Type: Feature/Change Request -Package: Documentation problem +Package: Scripting Engine problem PHP Version: 7.1.15 Block user comment: N Private report: N New Comment: Why does any function work the way it does? I don't know of any reason why isset shouldn't work on expressions. I don't like inconsistencies. Let's make this a feature request instead. Previous Comments: ------------------------------------------------------------------------ [2018-03-22 05:21:33] faith dot morante at gmail dot com I see, thanks! But how come the empty function works with non-variables? ------------------------------------------------------------------------ [2018-03-22 05:17:07] requinix@php.net Don't use isset on the result of an expression. If you're trying to say that the documentation does not mention this, it does: > Warning: isset() only works with variables as passing anything else will result in a parse > error. ------------------------------------------------------------------------ [2018-03-22 05:11:32] faith dot morante at gmail dot com Description: ------------ --- From manual page: http://www.php.net/function.isset --- Getting this error: Cannot use isset() on the result of an expression (you can use "null !== expression" instead) on line number 3 When explicitly passing a data in isset. Passing a variable with the same data works,though. Test script: --------------- var_dump(isset(null)); Expected result: ---------------- false Actual result: -------------- Cannot use isset() on the result of an expression (you can use "null !== expression" instead) on line number 3 ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=76135&edit=1