Req #70986 [Opn->Dup]: Constants in traits

Edit report at https://bugs.php.net/bug.php?id=70986&edit=1 ID: 70986 Updated by: cmb@php.net Reported by: owlet at avtovokzaly dot ru Summary: Constants in traits -Status: Open +Status: Duplicate Type: Feature/Change Request Package: Class/Object related PHP Version: Irrelevant Block user comment: N Private report: N New Comment: Marking as duplicate of the more recent request #75060. Previous Comments: ------------------------------------------------------------------------ [2016-07-29 13:10:21] cmb@php.net For reference: <https://3v4l.org/e3SMZ>. ------------------------------------------------------------------------ [2015-11-29 11:59:08] owlet at avtovokzaly dot ru Or, perhaps, to use an expression for compiler in the same manner as for methods: use A, B { B::CONST_A insteadof A; } ------------------------------------------------------------------------ [2015-11-29 11:51:54] owlet at avtovokzaly dot ru Is it possible to disable in this case classified the same name in different traits constants used in the same class? And leave the behavior the same as in a regular class with a redefined constant: Fatal error, with message "Cannot redefine class constant"? ------------------------------------------------------------------------ [2015-11-27 22:54:29] bwoebi@php.net The issue is that we don't have collision resolution for constants in case we use two different traits defining a constant with the same name… In general, that's related to the general limitedness of traits being pure compiler copy&paste directly into a class and not just sharing scope… ------------------------------------------------------------------------ [2015-11-27 14:37:35] owlet at avtovokzaly dot ru Description: ------------ Sometimes we need to define constants directly in trait. Now it is impossible and can be done throw namespace constants, for example, But this replacement very uncomfortable. Test script: --------------- trait A { const CONST_A = 'value of A::A'; } class B { use A; public static function getA() { return self::CONST_A; } } echo B::getA(); Expected result: ---------------- value of A::A Actual result: -------------- PHP Fatal error: Traits cannot have constants in php shell code on line 2 ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=70986&edit=1